Sounds extremely suspicious, I googled umba habanero and there is practically zero mention of it anywhere, unless it is the same as aji umba (and it sounds like it is). This thread is actually the 3rd hit on that search. I haven't grown them, but aji umbas are supposedly habanero-level heat. That link says that they were tested 2 years in a row at over 1 million scovilles, if that were true there's no way that no one would know about it. Bhuts/Bihs/Nagas, 7 Pots, and Trinidad Scorpions are the only varieties that ever test that high (and all of the various strains of these).