Hello Michael - this makes complete sense ! Indeed, it's definitely the edge being "pre-picked" under the hood sice it is consistent with what I am getting when all filters are off. At the end of the day in my case it doesn't really matter much anyways since the actual click picks up the intended object anyways - I just have to ignore the "un highlighted" status, so to speak :) And yeah, I totally get what you mean about this kind of deep dependencies and what happens when twisting things outside of their default/intended uses.

The selection distance setting seems rock solid ! I already more than tripled it so far and can see no ill effect whatsoever. I'll probably stick to around 20pix or so, that seems like a good middle ground. It's a great time saver as it allows to think of and operate on selections in a more fuzzy, rapidfire way. Only downside being that it causes more "false negatives" on preselection highlight, but as said I am training myself to ignore that anyways :D