hello ! im new usin limewire,need some help (verifying download, speed question)

[xariel77]

hi , everyone. im Ariel...(argentina) new at the forum. and using limewire, i have some questions, if someone could help me i'll thank you.
one of my doubht ... i was downloading a movie. and when it's got to an end, it started again, and it says something like..."verifying contents" , is it normal? could I stop a download and continue it a bit later? (next day for ex.)if so. how do I do that?
last question... what does speed depend on? why does it increase and decrease frequently? ok. i hope you can help me ...see you!