GarageBand keeps changing pitch

So I’ve got GarageBand 10.0.2 because life and MBox2. My instruments are tuned to each other, but not exactly at 440hz. GarageBand seems to want to automatically correct all the pitches, and I need it to not do that. It keeps accepting the onset of the pitch but then adjusting and lowering them as they are sustained. (I assume the adjustment/pitch bend is to the 440 tuning). Is there a way to not make it be doing that? Just to accept whatever pitch is initially thrown in? Thanks!