Electrical in basement bathroom?
Maybe I am just stating the obvious, but the diagram you have posted is correct. If you followed the diagram wiring scheme, then everything in your basement bathroom is working correctly.

This means that even though you tried to follow the diagram you have wired something incorrectly. You need to verify every conductor in you circuit and follow them through to find your error. You can safely do this with the power off and a continuity tester. It might help to have someone assist you. So check each wire and its path and location. I am guessing that somehow you have installed the power source conductor on the wrong post or posts. You can verify your source conductor with a voltmeter or non contact indicator. 

One other thing that bothers me:


  1 fan/light combo (14-3 going to this on a three way switch)


You named the fan/light combo correctly, then called it a three way switch. A three way switch is not a fan/light combo. A fan /light combo is a single device that has dual single pole switching actions. One for the light and one for the switch. Just make sure you have the right device.

Good luck and stay safe.