This is happening for me as well, but no for all products. For those that don't show up, I have gone in to "edit" the product in the developer account, re-type the product name and save again, and it usually shows up. Extremely annoying.
I don't know if re-typing the name has anything to do with it, but since it worked for me I keep doing that. Maybe it's just the re-saving.
Hope that helps.