Just thought I'd mention this, in case anyone else is experiencing the same and is as confused as I was...
I've been getting emails announcing sales on Fotolia, but when I've checked each time, my balance hasn't updated. On closer inspection, these emails relate to sales from an earlier date, but are being announced via email today.
I guess they have some kind of backlog that's recovering itself, as I also had normal and correct emails earlier on, relating to sales from today.