do they?
Another question... When I return movies to the actual store does that change my que automatically or does blockbuster.com still wait until they get the movies to ship me more?

I think they do. They certainly update the website showing it's been shipped. I've been with BB for quite some time and I getr twice as many movies as my buddy on Netflix

I have a three movie out plan and they just sent me 5 movies--some that I'd removed from my queue.

They used to ship to me on Saturdays, but I don't think they have been lately. However, they do officially ship on Saturdays. In-store returns are scanned at the store. The returned rentals will (inexplicably) still be shown in the "shipped movies" section of your queue until they are received by the distribution center, but the next items in your queue should begin processing immediately.

Both of your questions are answered in the help section of Blockbuster's website.

They frequntly send me more than my 3. I can have 3 which I trade in for 3 from the store plus they'll send another 4 or 5. They don't wait until one shows up to send another. I had Netflix for about two months and I think I got the same number of DVD's I get from Blockbuster in two or three weeks.

Yes.