Changing Engine Oil

[CardSharpCook]

OK, So I dedcided to change my own engine oil. How hard can it be, right? But I've encountered a problem. I've removed the old oil filter and let the oil drain, but damned if I only collected a little less than a quart of oil! WTF? So I poured some new oil in (about 1/2 a cup), just to be sure it would drain, and sure enough, no new oil drained out. Checked the dip stick. There is still plenty of oil in there. There has got to be some crucial step I am missing right? Gonna look this up on the internet, but I thought OOT's my best bet, so I came here first.

Thanks