Yes, but in my case that's a mistake too, because they said "the" previous "email" (singular case) was a mistake, whereas they'd sent me more than one saying the same thing.

And they told me point total was wrong, whereas it's correct. It's the additional 500 point part that was wrong (or at least misleading), not the total, but they claimed it was the total that was wrong.

So both their original emails and their correction emails are wrong!