USPS: First Class Option? / Form Validations

I’ve been doing some custom work with MarketPress. I have two problems though.

The may be related to my USPS setup, but I’m just checking here to see if there is anything I’m missing. I’ve activated USPS and everything is working fine. All the shipping rules show up on the checkout page EXCEPT First Class which is checked in the settings. I’m wondering if this is a bug or something to do with our API.

Second, in testing the forms in checkout, I noticed that the form won’t validate if the required fields aren’t there, which is good – but there is no visible marker for users to know which fields they missed (red border, arrows, red text). Is that supposed to be there? Did I break something?