This group is fairly new and we're still fighting to get better propogation but it takes time. That is, post a note in the group asking for the missing parts to be reposted for you. Sometimes segments don't propogate quickly and may trickle in later. If no episode name is available use the air-date if it was provided in the initial posting. This is important since several episodes of the same program may be posted at the same time.
Nobody pays folks to upload programs.
It's a hobby. We do it because we want to share. A bad attitude will quickly harm your reputation in the group and result in less than favorable responses to future repost requests. If you consistantly see missing parts on virtually everything posted then it's time to search for a new provider. Asking for massive reposts might be tolerated for a short time but repeated large scale requests will eventually get you an undesired reputation in the group.