Not sure what's happening here

My machine is cutting threw my parts . By that I mean right threw the middle of them torch doesn’t seem to shut off when it travels across an already cut piece

Does your plasma cutter have a T1 and T2 setting? if so set to what ever its not set to now and try it.

I beleive T1 is pull trigger it fires let off it stops, T2 pull trigger it fires and dont stop till you pull it again.