Large Number of Post Types – Meta Boxes don't Display

Since I can’t seem to get any sort of URL routing to work for custom post types with capability_type of page, I’m trying an alternate route to accomplish this task.

Basically, I’m creating about 100 or so post types ‘product’ (each with a unique, incremental name — ie: product0, product1, product2…) and the slugs build off each other by category, like a taxonomy (ie: product … product/subcategory1 … product/subcategory1/subcategory2 .. etc). However, when I click add new for the post types, the meta boxes I attached to that post type do not show up; each post type only has two meta boxes to display. Effectively, I’m creating about 100 post types for my hierarchy, and each post type uses two meta boxes (which are all the same for each post type other than being given a different title, but are new instances).

All of my other meta boxes for my custom post type pages work correctly. Does anyone know how to get the meta boxes to display when using a large amount of custom post types?

Or, if someone has a way to do SEO friendly custom post types with a capability_type of page, I’m all ears (I’ve read about 30 tutorials or so and I still can’t get it working with .htaccess or WordPress rewrite functions).

Tried in 3.4.2 and 3.5.1.