Saw this and don't understand what I'm missing. Why would Thomas cancel out Mosley and not Z Smith?

nd
@RavensSalaryCap
Earl Thomas will qualify as a 3rd Rd Comp pick gained and will remove the 3rd Rd Comp pick for the loss of CJ Mosley. The Ravens are now +3 pending other signing and/or losses.

17
12:27 PM - Mar 13, 2019

Earl Thomas 4/55

Z Smith 4/66

Mosley 5/85

What am I missing?