This sort of strikes me as odd. I mean, revise the first 10 and then...what? I can see if it was a partial and she gave you a R/R, but, idk, revise 10 pages to her specs? How does she know what happens next??
I'm curious who this agent is, and feel free to pm me, because I know one agent who does this and I'm not real keen on it to be honest.
If you agree with the changes, and it's just a matter of tweaking, then do it. It just gives me a little whinge (wince + twinge

) and I'm not sure why.
As for the other agent, that's nice that she gave you the smiley.
Here's one as well.
