I have no clue what happened here, but it's scary. @LeanneS imported a Trilogy file, then deduped one of the contacts. This donor's latest donation disappeared due to T117630, so Leanne edited the check number and called it "1044b" (I believe). When the file was reimported, the donation somehow overwrote another contact's donation from the same batch, donor 11998248. Leanne noticed that this donor's donation amount was wrong, and the incorrect data matched the "1044" row which applied to another contact.