The way I see your photos;
1. Your spine is consistant with your edge problem, the edge is not being honed other than the last 1/3 from the toe. Look at your spine, I see wear that would cause your problem. You can double layer it, as suggested above, that might level the spine enough to lay the edge flat.

2. I'd layer it & rework/reset the edge at the 4K. I would not leave the 4K until the problem is solved.

3. Touch-up of a previous shave ready blade is "honing". The place to begin your honing journey, IMO. So, as suggested about, get a standard set by sending it out & then maintaining it with your 8K or whatever finisher you have.