Think I know the answer, but will ask anyway. I had someone buy something, but the royalty was cancelled, and there was a "deleted" note under the product name in the royalties list. This was from about a month ago, but I just noticed it today, for whatever reason. Evidently I was in editing mode, and deleted something that I didn't even realize someone had bought. I feel bad, and would love to contact the buyer and apologize for any inconvenience, and let them know I re-designed and re-listed the thing, etc. I doubt we're able to reach out like this, but thought it was worth asking.
