Diana,
Try this for a specific category
auctionads_ad_kw = <$MTEntryCategory$>
when you are putting in your keyword.
As far as using quotes I always get a very similar # of results when i put something in or out of quotes... I'll look into that further though
Just play around with it a bit and you'll get the exact results you are looking for, testing it is the key and use the examples I listed in the e-report to maximize the profit potential
And as always ask as many questions as you need... I want you to get the most out of the report