The compensation move is to take up backlash on a machine with slop in the feedscrews.
Although it's been a while since I've looked at the E-stop logic, I think that the backlash preload registers are reset to "indeterminate" after an emergency stop in case the table has gotten knocked around a bit (broken or jammed cutter, vise with a new "feature" in it, etc). Thus, the next move is backlash compensated.
You can get rid of this by deleting the lines in your turbocnc.ini file that look like this:
Backlash=_some number in sci notation_
for the axes in question and restarting the program.
Another option would be to modify the source code - I believe it's the PanicStop() procedure that handles the interruption of motion when ESC is pressed or the external e-stop pin goes active.
Compensating after stopping a move
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