This is an interesting one to be sure, I would almost want to see a video of you shaving, just to try to properly diagnose the issue.
If your prep is solid, your lather is good, you're using next to no pressure with a proper blade angle, and you're stretching your skin when necessary, then unless you're misunderstanding some part of the process, I don't see where the problem is arising other than a problem with the razor itself. I hope you update us when you receive your EJ89.
In the meantime, stop overlapping your strokes, you should never shave an already shaved spot before relathering, make sure to follow your beard map such that WTG is actually WTG, and try to limit yourself to a single pass. Even now I don't go ATG on my neck, sometimes it's not meant to be, good technique or no, plus I think most people would have unpleasant results with lather sitting on their face for 70 minutes.
Stetsons are cool!
Proud member of BOTOC
WTB 1923 razor, serial number from 336677B to 391575B