Thanks for the pics on that and running it (I’m not tech support, just a forum person).
I’m assuming you have the basics right, but I’ll mention them anyways. The material is sitting down inside of the rails of the crumbtray? The crumbtray is properly located in the dimples on the bottom of the unit, effectively locking it in place?
I thought your cuts looked kind of wide in the first images and the second ones on the Gift of Good Measure definitely look too wide, which indicates to me the beam isn’t focusing properly. That would also explain the trouble with your engraves not going through the masking.
Have you ever done a cleaning on one of your Glowforges? I would check the lens inside of the head. Remove it with the lens removal tool (a little teal cylinder-shaped tool). The glass in the lens is offset to one direction in the lens holder. When you reinstall it, the glass should be biased downwards, towards the bottom of the head.
Here are instructions for that:
It might also be worth removing the lens under the magnetic head to make sure it’s situated correctly.