@Popper:
Yes, you got it right. Any new downloading peer got plenty seeds to download from and the one who is stable at a part will have disabled some files from download.
The gap explains with the fact that your client will not connect to other seeder, because there is no need to exchange anything with them, like your client the other seeders got all files.
Thank you for the reply, Popper. I really appreciate it. I knew that leecher had to have skipped something in the torrent. Thanks for confirming it.
That leecher is gone and the torrent is going strong, so the problem is resolved
aries83