[LG V10 Q&A, Help & Troubleshooting] SaintlySins:
This happened to me on the Moto X (first generation) ... I've been screwed ever since.

My problem with this is how invasive - while at the same time disruptive, repetitive and completely unnecessary this unauthorized merge is as it duplicates contacts.

Example:

1. I have 1 email (& matching Contact List) for work and work related contacts. These contacts include only their work phone and email - and in some instances their work cell # -- which of course would be labeled "mobile" as that was the only labeling option a decade ago.

2. I have 1 email (& matching Contact List) for my friends. These contacts include only their personal phone and email. Although there are a few cell phone numbers that match the business cell, the rest of the info is unique to their personal life.

*** Part 2 of this Contact List is their wives/sig-other gets a Contact Listing - to which repetitive info like the land line and maybe e-mail address is entered, but more importantly their individual cell number. This makes contacting them individually an easy task without guessing what cell number goes to the husband or the wife ... and in some instances ... their kids (who sometimes baby/dog sit). [This may sound rather convoluted to you younger kids, but 10 years ago we didn't have the option of custom labeling the phone numbers, only a short pull-down list of Home, Cell, Fax ... so this is how we did it ... and a decade later with several hundred entries, we're NOT going back to redefine all these fields and merge contact lists as this is still an easy system].

Well - a while back when the Droid X came out, I loaded each email profile into the phone separately - Google/Droid decided to merge all contacts and it's been a friggin' disaster ever since! I went from 200 to 800 contacts in different email/contact profiles, to one, bigass, convoluted, double, triple, quadrupled contact list that is impossible to tell which one is from the Work List or the Personal List or any other miscellaneous list I had .... a 4000K Contact list for every email account - not just g-mail, but Outlook and Windows too! ! !

I've yet to find any app that can simplify or remedy this for me ... (I've spent WEEKS looking for one ... so about a year ago, I took several days and merged all the Contacts into one Gmail list and custom labeled EVERYONE on those lists into one, clear, concise list. I admit that I'm anal about keeping things organized and in clear and concise manner and this may seem nutty to some ... but I also don't make the mistakes my friends make with mis-dials and wrong numbers.

I've had some issues ... (hint: once done, copy to a window computer, then go and delete every back up you ever made of every contact list in every e-mail file to prevent reloading old files into the new, revised Contact list.) ... but I stay on top of it and delete or modify any duplicate. I'm almost back to being sane ... probably because I haven't stopped drinking ;- )

It's going to be a long and lonely road back to sanity. Google is invasive and loves getting all the info it can and will "F" up the way you kept it.

Good luck with a solution. Please post a solution if you find one.