Google Base Feed not showing all products

Thanks to uksitebuilder for helping resolve my previous extension error.
viewtopic.php?f=188&t=184421

I have been able to successfully fetch XML feed from my site however I'm having trouble with product not being retrieved.

I have 3 categories so far....
1. Home & Garden > Household Supplies > Shoe Care & Tools
2. Apparel & Accessories > Clothing Accessories > Hats
3. Apparel & Accessories > Shoes

I was able to import/update Google category list no problem

Both categories 1 & 2 are fetching from merchant center no problem. When a new product is created the feed updates. However most of my products are shoes and fall under the 3rd category. So far I have a total of 35 products, 31 of which are shoes.

When I remove categories 1 & 2 from extension the XML feed is empty. No shoes are appearing in the feed. I have checked to make sure there are descriptions for each product as I understand it will not pass product through the feed if the descriptions are blank.

Am I missing another attribute that google requires for shoes? Maybe google's requirements for the shoe category are different from other categories? Any thoughts?

OC Version 2.3.0.2

Thanks