Hi @BrockW,
Can you post a screenshot of the preview / what the cut should look like?
If the problem is “only” that the corners should be more pointy and they are slightly rounded, a possible cause can be that the vbit you are using has a small flat tip, and therefore your Z zero should be artificially raised a notch. I know you said you did raise and lower the Z zero, I just thought I would mention it and if you do have a flat on your vbit, use @neilferreri spreadsheet in that post to figure out by how much to raise the Z exactly.
Other than that it could also be some slight play in the Z axis, have you checked for that ?