The easiest way to have this happen is to have a human type the date, and have them make a mistake. (Ever put the wrong date on a check?) But there's not enough info in the article to know if that's a possibility here.

And there's plenty of reason to think it was something other than suicide. Two checks in a row got skipped, and two cameras malfunctioned, all in the same night? And someone mistyped the date on the statement? All just coincidence? That seems... improbable.

So, while I can see that there could be an innocent explanation, I'm not convinced that there is one.