Taxes

Out of 7 products, all from the same product category, 2 products didn't charge tax yet they are set up the exact same as the other 5. Why would this be?

The only possibility I can think of is that the tax category of these two products is not set.
Could you confirm that you set it for them ?

It is set for both

I don't have other ideas. Could you do screenshots of your main tab of the config, of the taxes rules listing, of your product tax category option in your products and give the URL of your shop so that we can test that ?