I use Aol Silver
Your second question first, the write email window:
No change on mine, still have the buttons you lack.
The advert banner across the bottom of the read email window:
This is hardly obtrusive on mine. It changes frequently and is not always animated. I do use a smaller (not full screen) size.
But taken together and by changing recently, it may be that something is corrupted or invaded.
I have had a good spell of stable and reliable connection for months now, so not sure which of the Aol tweaking programmes to try, but after a thorough scan for malware, you could try their Live Chat?
From my experience there you will be quoted from some "Good Book" without much regard for your individual problems.