I've gone through Odoo Apps extensively, and the apps that I have found and even purchased one are either way too much for what we need, or do not fulfill are needs. I really just need a Sales Report that shows paid invoices for a two week period for certain sales person and can also take out non-commission items such as shipping charges.

I think there wont be a module which can deliver you what exactly that you are looking for. For this you can develop a custom module if you are technically skilled or you can contact some partners to develop such a module for you