The red card was given for "serious foul play" as written in the report. So, really, the appeal should'nt have been allowed. But, in all reality, given the position of the players it was only a yellow card. Because he got a red and successfully appealed he now doesn't even get that.
I'm pretty sure that there is something written regarding the last man though, I'll have a look in all the garbage I've got from FIFA (if it's free-it's good! and I WILL find a use).