Workers Of Wood

I know you guys are probably tired of me asking dumb questions, but dumb questions are how I learn.

I've been playing with my Aspire and AvidCNC because doing things allow me to learn. But I am stumped for now. I made a 3-D carving from two models that I got somewhere on the internet. I've made my pocket, put the models in the pocket, set a zero plane and cut the model which is my wife's family crest.

But, here's the problem. When I do an offset carving, it is leaving lines at the corners and it is leaving a false square pocket into the model. I've looked at it in Aspire, and there is no appreciable change in Z-height on the preview, so I am assuming that this is getting into the model via some software glitch or an error in machine setup/calibration. I can understand that the lines radiating from the location where the spindle makes the change from y-axis to x-axis being maybe an alignment issue, but not the box.

I leveled the spoilboard with a spoilboard cutter after first spending hours with a 1/2 inch spoilboard cutter cutting x and y axis 90% offsets and getting the machine aligned the best I could.

I have attached a couple of photos to show you what it is doing. Any advice as to what I am doing wrong would be greatly appreciated.

thanks,

Mike