Increase Columns per Row, From 3 to 4

I have the Column Layout Grid installed on my zencart 1.3.8. I currently have 3 columns per row and I want to increase this to 4 columns per row. I thought that it was as easy as changing "Product Listing - Columns Per Row" in Config/Product Listing but I guess that I was wrong. Change it to 4 and nothing happened, read that it could be a spacing issue, but it did nothing when I changed it to 2 as well.

Probably going to kick myself when I get the answer, but I gotta ask...

Thank you in advance

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O.k., Guess too many hours staring at the wrong thing here. I was actually trying to adjust the Columns per Row where it shows the Category and Sub Category Images. Turns out that it was changing the actual Product Listing just as it was suppose to, which I needed this changed too. After I change the structure of my site, this will be irrelevant anyway. :frusty:

At any rate, case closed, the problem was me :oops: