All Products Search box

Hi i've identified what i think is a problem with the Search Engine crawling the several different options in the 'all product' listing page, the options in the box are as follows:

Product Name
Product Name Disc
Price Low- High
Price High - Low
Model
Date Added New - Old
Date Added Old - New

Now what i think is happening (and correct me if i'm wrong i'm no expert!!) is the crawler must be searching the product lists through each of these selections and coming up with duplicate title tags etc due to it crawling through the differing options and finding the same products each time??

So what i would like to try is to remove some of these options such as maybe restricting the options to Product Name, Price high - Low and Price low to high this hopefully will reduce the amount of duplicate hits and should give my site a better SEO score.

I thank you in advance for your assistance!

chris