Website data from sites I've never visited
I have a new MacBook Pro. The previous laptop I had was an iBook G4. Instead of having cache and cookies separated, it's now all in one. I browse with cookies disabled turn them on for specific sites. Now that cookies and cache are combined, I'm seeing sites storing information (even though I have it set to not store anything) that I've never heard of or visited. I have information from 101cooks, 39degreesnorth, etc. I've never visited these sites ever. I have ad block, so I don't see ads, so I don't think the information could be from that?
Why am I getting this information stored on my computer? Is there a way just to have only the websites I want store information and deny everyone else?
Also, will Safari go back to having cache and cookies separated? On my iBook, I would clear my cache regularly and it wouldn't affect the cookies on my computer. Now if I clear my cache, it clears all my cookies so I have to go in and turn cookies on, log into the websites I want to store information and then turn cookies back off. Seems silly to have cookies and cache hand in hand.
MacBook Pro, OS X Mountain Lion (10.8.3)