I extracted the logs to investigate the problem you reported, and the first thing I noticed is the thinner line on the right most symbol is in the original design file. In the file, the coaster on the right, that one symbol has a thinner line.
Since this problem is being seen on materials that were purchased from another company, we can’t offer support for prints that don’t come out as expected. I’m going to move it to Beyond the Manual so other folks here can help. Should this happen with a print on Proofgrade materials, please open a new ticket in Problems and Support and we’ll help you right away!