derailleur interfering with spokes
 

Ive been having some problems with my derailleur rubbing the spokes when im in the smallest cog. It seems like there is too much slant in the derailleur as it cant really even shift into that cog without interference.

You need to have your derailleur hanger aligned. When it's right your derailleur arm should point straight down.

Bent hanger would be my first thought.

Uh... do you have your cogs installed backwards? The smallest cog is the furthest one away from the spokes.

+1 on bent derailer hanger. It's a simple adjustment if you have the tool. Your LBS should. I'd agree with 'XYZ also about putting your cassette on the right way.