Ok thanks for confirming!
Yeah the relatedness threshold is a bit hard to understand. There are no “units” so it seems like random number.
If, under “Display options for your website” you use the standard “list” button, then as an admin you will also be shown the score for each related item on posts and pages. It often varies between 0 and 100. I think explaining that better in our documentation is a growing priority, although I don’t yet think I understand it well enough to explain it well (I’m not the original developer.)
Anyways, we expect to release this fix next week. Thanks @krsp !