Count CHOP - decrementing problems

So, if I setup a Count CHOP with a trigger threshold of 1 and a release threshold of -1 and tell it to increment on ‘off to on’ and decrement on ‘on to off’, it should go up everytime i go past 1 and down everytime i go below -1 right? It seems to increment fine, but it only decrements once and then wont decrement further when I go to zero and then back below -1. Any thoughts?