Trouble with renting iTunes movie on my iPad

I rented a movie on my iPad 2 for the first time, but now I can't find it.

I was a couple of days ago so it makes sense it's not there anymore because I guess you can only rent for 24 hours(?), but it wasn't even there just after I had downloaded it.

It's not in the "Downloads" in iTunes and if I click on "Bought" it just takes me to the music player that is empty.

I got a receipt on my mail. Ordernumber: MG*****0GF

I just don't want it to happen again next time I rent.

(By the way, is it normal that it takes about 2 hours to download the movie when I had choosen to download instead of watching it online?)

<Edited by Host>