Electrical: Wiring a dimmer switch in a circuit with fixture, outlet, another switch powering 2 other fixtures
Did I mix up wiring somewhere?


Yes.


  All are working, BUT: Now, the outlet and light/fan are not hot until the dimmer switch is turned on. Furthermore the outlet and fan are reduced by the dimmer.


Apparently, you wired the outlet and fan in series with the dimmer.

Re-check your wiring and make sure the outlet and fan are fed by the hot feed in the circuit NOT from the load side of the dimmer.

Good luck and stay safe!