iTunes keeps adding artists on to other artists song's.

So this problem had been going on for a while. Its hard to explain but I'll try. The only way I can think of explaining is with examples. Let's say you have an artist, in this example, Skrillex. Skrillex works with other artists. However, whenever I sync my phone to iTunes, it categorizes every skrillex song as "Skrillex & Damien Jr. Gong Marley", and they've only done one song together. This also happens with Yellow Claw. All Yellow Claw songs are now listed as "Yellow Claw & Tropkillaz". Another example: all deadmau5 songs are now "deadmau5 & Wolfgang Gartner". It's really frustrating when I'm trying to find a song, plus I'm OCD so it bothers me quite a bit. Please help! Thank you.