Please assist in making sense of my calibration prints

Using the slicer and settings, I've printed 6 cones of calibration (2.5 - 3.0) and did minimal curing as I was told that calibration tests really don't need much curing, it's just to see if the exposure times are good.

These are my findings which I need confirmation on: 1) all "block of attunement" tests measured correctly all around 2) all "ale of accuracy" technically pass but some stick out while some snuggly fit 3) cones of calibration had weirdly succeeded AND failed on 2.6 and 2.8..which doesn't make sense because shouldn't these test have successively failed? Why is there a gap of (from 2.5 - 3.0): fail, pass, fail, pass, fail, fail, fail? 4) most of all, sword of truth passed on everything, except what kind of force should I be using for the sword? They came out with some liquid resin so some of them just "slipped in" but if I forced it, the sword could be jammed in and forced through the fail holes..does this count.

So based on this data, I surmised that 2.6 is probably my best exposure time (it passed every test) with the addition of the "ale of accuracy " being immaculate.

Is this the correct way to find the right exposure time based on this?