Cutting layers incorrect????

I have attached 2 pics of what I am cutting out, cuts the inside layer which I have all grouped as one layer correctly. Well, when it goes to second layer [outside line] it appears that it seems to be higher by a few inches…the sheetcam simulator. Shows it cutting out correct. … O and one will mess up, move torch on table,zero axis out, and the next one will cut great! Same file same settings,. Any help would be greatly appreciated! I’ve had the table a month now been a long hard battle self teaching lol

Which post processor are you using? Does this machine have a Z touch-off switch?