I have the impression that there is a bug in the Farm part.
In line 2 I have staked MEX in lock and I receive well Locked MEX
In line 4 I have staked MEX without lock and I receive MEX
On the other hand, in line 1, I have staked MEX in lock but I receive non-locked MEX and in line 3 I receive Locked MEX for staked MEX.
So I have the impression of a bug on line 1 (where I should receive Locked MEX) and line 3 (where I should receive non Locked MEX). Or is it that I didn't understand how it works?