It's not clear to me whether Discogs uses bots, but a large number of entries seem to come from individuals who contribute details from albums in their own collections using information off the sleevenotes. There is certainly plenty of scope for error and misunderstanding, especially where there are different artists with the same name - I am identified as Howard Jones (7) and Howard Jones (10) in the entries for the same album. Also some sleevenotes are lacking in information, or may have made a mistake in attribution.

The whole idea of Discogs is that it relies on crowdsourcing, so since you're that bothered about it it should be possible for you to edit incorrect entries yourself.

While misattributions are annoying, when it comes to royalty payments these are based on the databases run by the performing rights associations - in the UK, this is PRS/MCPS. You should be more concerned that these contain the correct information, although be aware that it is entirely legitimate to claim copyright on an arrangement, which is entirely separate from rights in the original which remain with the original copyright owner.