Wan - strange... how are your other settings configured? Have you enabled the "allow edits during sessions" option? What about reviewing incorrect cards at the end?
radioman - this is mostly correct, yes. However, the new cards to learn are only randomly selected if you configure it that way - you can also set them to be chosen in the order created (or approximate order, which randomly chooses between cards created on the same day). If you've learned 500 then you would indeed get 505 the next time you run it. If you reduce the session to 200 cards, the ones that actually show up will depend on what card selection algorithm you've selected - if you're using Frequency-adjusted then they'll come up at the same frequencies they would otherwise, so you probably would see all 5 unlearned cards at some point but it's not guaranteed. With Random card selection, however, if you configured the learned:unlearned ratio to say 50:50 then you would definitely see all 5 unlearned cards (and no more; it would choose the other 195 randomly from the learned ones); if your unlearned limit was 100 and you had 100 unlearned cards and 500 learned cards you'd see 100 of each in that mode. If you bail out of a session after learning one of the cards, that one will go into the pool from which the other 195 are drawn but the other 4 unlearned cards would keep coming up until you learned them, so there'd only be one new unlearned card added.
Bit confusing, I know - there should be a slightly better explanation of this in the 2.0.1 manual, though I don't really expect it to be that widely used until 2.1 comes out and we (hopefully) finally make some progress on flashcard ease-of-use.
mfcb - this is kind of tricky, unfortunately, since we do a couple of little hacks to get keyboard presses to reliably end up in the Input Field in the main screen - before we did that we'd get frequent complaints from people that they'd enter a letter and not have it show up (because the Input Field had lost the keyboard focus and the characters were getting directed somewhere else - difficult thing to completely prevent). However, in the just-released Beta 2 there are now shortcut letters in the menus, so you can access almost any command using those - press the softkey to launch the menu and then press the appropriate letter (or letters if it's in a submenu) to activate the command.