I never updated a MAME set on my NAS, always using uTorrent.

I joins quite ok, but when updating one release, I have some MB or GB more than the set actually is, then with further updates I suddenly have 5 GB more than the set actually is, so I guess then there are duplicates.

Don't need to seed at PD, I'm currently at 6TB upload.

I know about the redownloading at PD, but did it already several times, and nothing happened, didn't even get a mention or a warning.