Hi, i have the same issue here but my samples show as "High" (3.3%0 and 3.4%0), i did 3 vertical mineshafts with no results. i installed a mod adding a 3rd mod for the Propick (sample 64 blocs in a strait line) and dig until reaching layer 64, then create corridors and sampling under and above to cover 128 blocks. No results.
My question is, can a high probability result be wrong ? am i wasting y time instead of exploring ?
Red dots indicate decent prob, green high