[General Questions and Answers] USCanthony:
Check your individual contacts and group settings

If I am reading your post correctly, it sounds like you pretty much have the basic settings correct. Groove IP works via Google Talk so it is important that you have added Google Talk as a "phone" on the "Phones" tab in the Google Voice setup via their web interface. It sounds like you have done that though. Since you do not want calls to your GV number to forward to your cell phones number, you need to ensure that you have unchecked the box next to your cell phone entry on that same "Phones" setup page (if you leave the receive text messages and voicemail notification boxes checked, those two things will still work even if you have unchecked the phone for voice forwarding). Once again, it sounds like you have already done this.

I have found that if both Google Talk and the cell phone number are set to forward, the cell phone number will always start ringing before Groove IP starts ringing. Groove IP usually starts ringing around the 3rd ring of the cell phone number. If you are answering your phone on the first few rings, you may not know if Groove IP is really ringings through or not. This does not solve the problem of why your cell phone number is ringing if you have forwarding to it shut off but you might want to do a test call to your GV number and let it ring while watching the display on your cell. If it is ringing through to your cell's number, a screen displaying the caller ID and options to answer the stock dialer should appear. If Groove IP is properly forwaarding to Goole Talk, the the Groove IP screen should come up over the stock caller ID screen somewhere around or after the third ring of your actual cell phone number. If Groove IP does eventually forward through then you know that the Google Talk forwarding is working and you then just need to solve the cell phone forwarding issue. If Groove IP does not forward via Google Talk, there are several things you need to check.....

Groove IP works by default over WiFi but can also use your 3G/4G network if you are not connected to WiFi. That ability is not enabled by default though so you need to go into the Groove IP settings on your cell phone and check the box allowing 3G/4G calling. This sounds like a pretty obvious thing to setup properly but you would be surprised at just how many people overlook that setting.

If that is setup properly and Groove IP is still not ringing through to your cell phone via Google Talk, then you will need to go into the Google Voice settings via the Google Voice webpage and check the settings for your "Groups" (if you have contacts assigned to groups). All of the groups have individual settings for what phones the contacts assigned to that group will ring on. These settings will override the settings on the "Phones" tab in the main settings panel. If Google Talk is not checked for you groups, that will be a problem. You may also want to uncheck your cell phone in the group settings.

You will also need to check how you have each contact setup. If you click on the checkbox next to a contacts name the far right panel will display the information entered for that contact. At the bottom of this there is a link you can click to "Edit Google Voice Settings". Clicking that link will take you to the individual GV settings for that contact. If you have your contacts assigned to groups, then ideally each contact within this individual settings display should be getting their settings from their group assignment. There is a setting at the very top of this page Where you can choose the group you want to use the settings from for that contact. The individual contact will then get thier settings from the group. This can be overriden though and the individual contact settings will override both the group and main settings in Google Voice. Under these individual contact settings there is an area where it lists what to do "When this contact calls you" If it is using the group settings to determine what phones to forward to it will say "Use "Group Name" Phones" in this area and there will also be an edit link next to that. If you click on the edit link, individual entries and checkboxes for the phones you have setup in GV will appear. If the contact(s) has not been assigned to a group then these entries and the boxes to chose them will be there by default. If you do have groups assigned, chosing these individual entries will override the group settings for the phones to ring on. How you want to gio about setting all of that up is really up to you. Groups, no groups or groups for everyone but a few important contacts also have individual phone settings that override their group membership? It does not really matter as long as you have ensured that Google Talk is properly setup in these areas and that your cell phone is not set to forward to its number.

If all of this is properly setup then Groove IP should ring on your cell phone. If your cells number is still forwarding even though it is unchecked throughout the Google Voice settings, try temporarily deleting your cell phone for the Google Voice settings altoghther. Then go ahead and call your GV number and ensure the Google Talk is ringing through to Groove IP on your call. If all of this works, then go ahead and add your cell phone back to the list of phones in Google Voice. You will probably have to ensure the it is not checked by default in the group and contact settings after adding it back.

If your cell number is still ringing through and Groove IP is not ringing (and you are not attached to WiFi), look at your cell phone to see what type of data connection you currently have. If you are currently in a bad area for reception you may not have a 3G or 4G connection. It might say 1G in your notification area. Groove IP needs either WiFi, 3G or 4G and if you do not have any of those currently connected, Groove IP will not work. The Groove IP icon in the notifiaction area will be red instead of green if you do not have a good enough connection for Groove IP to work.

If all of that is good though and all of your settings have been verified as correct and it still does not work, then I have no idea what might be causing the problem. If that is the case you may want to send an e-mail to the Grrove IP developers to see if there are any known issues with your cell phone or if they have any other suggestions.