Exclusive sales not taking down Content ID

I had a chat about this with the Beatstars support team who contacted their legal team over my suggestion.
Currently, when you sell an exclusive beat on Beatsars that you had uploaded to Content ID & more, it takes it down. This means that after you sell an exclusive, you can no longer monitor new usages of the beat, and that you can't whitelist channels after an exclusive is sold, which implicates a few things.
First of all, if someone buys your beat unexclusively and before they upload it to platforms someone buys it exclusively, you will not find this previous licensor's usage of the beat, and won't be able to whitelist it. This means that the decision to whitelist or not this person's channel is up to the person who exclusively licensed the beat.
Second, if people steal the beat then the exclusive buyer is now the responsible for taking them down and checking their licensing. This should be the producer's work, since they STILL have the copyright of the BEAT. This is something that when I talked to Beatstars support was misunderstood on their side. They said that you sell the copyright of the beat, and that this is the motive it gets taken down, but this is not correct, not even on Beatstars' default exclusive contract. "...the Composition provided by Producer to create the Master shall be solely retained and owned by Producer as a pre-existing composition, and the composition made by Artist hereunder is a derivative".
Basically, besides the implications I mentioned, producer's should keep the regulation of their Content ID, since that is not something that is up for sale.