Sheet cam issue?

Ok, so I thought that instead of just importing parts I would start numbering sheets, I usually buy 4x8 and cut to 4x32” or so. My thought was to have a sheetcam file showing empty space left on a sheet after cutting parts, then using layers bring in the new parts on new layer and cut those out. Still with me, ok. So that worked 1 time, but then the new parts came in on a different layer and the first layers were hidden? I got it to work, but is this a bug or am I missing something?

Are you saving it as a job and adding parts as you go, then doing different layers for operations?

No, but that was the plan. It seemed liked if I moved something to a layer and imported a new file then everything was scrambled??