CSS Anyone?

[charmax]

Do any of you on my flist know how to deal with CSS? If so, can you please, please help me out? ;) I have validated my stylesheet and it comes up clean but... I am still getting 2 big errors with the layout. One is the navigation background image (popping up where I don't want it to! Behind other links! Stay in the bloody navigation!) and number 2 error is the links I make within a page (bizarre wideness! Navigation image!)

Any help on this will be much appreciated.

ETA: Issues all fixed thanks to lim