I never have a jump of 7mm... But I do get a jump of 2 or 3mm if I'm not careful. Do you have your bed mounted on springs? I kind of need that because I need the extra time to react if I load some firmware that goes crazy. The downside is if you push too hard to remove a part, you might leave the bed shifted for the next print. And then part way through the print, it clicks over to where it wants to be and you get that layer jump.