First you must determine if the bevels are set, coming togeather evenly all the way across the edge.
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Here is a simple, 100 percent effective test. If you see shinny spots, those spots are where the bevels are NOT meeting. The edge should be a grey blur under magnification, shinny is not good. Make sure the stabilizer is not hitting the hone and holding the edge off the stone. Put marker ink on the stabilizer.
Once you have, for sure set the bevel, do 10 more lite laps on the 1K then move up to the next stone.
If the bevel is not set and you think you are not making full contact, use the magic marker test. Ink the bevels with a marker use colored ink, red is good. Check to see if ALL the ink is removed all the way to the edge, if not do another lap. If not remove in 3-4 laps you have a problem, find out why.
Sounds like your blade may be warped a bit and not making full contact. Use ink to monitor your progress. Downward pressure, will cause more problems, later in the progression with micro chipping.
You do not have to remove a 1/8th inch from the 4/8K, just make sure it is flat and smooth.
What are you using to lap your stones?
Once the bevel is set it is just a matter of removing the stria completely from the previous stone. Do not move up until the stria is removed, alternate the stria pattern by using a 90 degree and 30 degree heel forward at the final strokes of each stone so you can easily see the stria.
You may also try adding an additional layer of tape and ensuring that your tape is not worn through.
If you can, post a photo of the razor with a close up of the bevel on both sides.