I actually did several combinations of what you suggest.
I wondered if the names of the columns were too long, so I duplicated the columns too, and named then differently and then duplicated the stat to a new name too. This didn't make any difference, but then I changed the format expressions and got it to work, but then I was also able to change my new stat back to look exactly like the original and it still worked, so this is why I suspect it's something to do with the cache. I can't explain it exactly, and if I could give you the exact steps to make it work, I would.
IIRC, the thing I did which actually made it work the first time was changing formatting from /%.2f to use format_number, but I tried this in the original stat and it didn't work.
What I suggest you do is attach the stat you downloaded from the Repository to a ticket on the
Support system , and link to this thread in the reference field of the ticket so that the issue doesn't get missed.