I can't recommend anything that you've done to install that toilet. Connecting the shower hose to the toilet bowl is no different from connecting any other fresh water line to the toilet...something that should never be done to any toilet designed to use sea water because it risks contaminating the fresh water supply, damage to the toilet, or both...and every toilet mfr warns against it in their installation instructions. This story illustrates good reasons why:
http://www.chron.com/houston/article/Worms-infest-Houston-suburb-water-supply-6415176.php If it can happen to a municipal water supply, your onboard water supply is even more vulnerable.
"Power went into the vanity then up behind the vanity to the panel" doesn't sound like the toilet is on its own separate dedicated circuit, with its own breaker, shared by nothing else that either reduce power to the toilet or have power reduced to it if both are on at the same time because low voltage is very damaging to motors--including toilet motors-- and other electrical devices.
I've been at this enough years to be pretty sure you're just gonna let my comments go in one ear and out the other...but with any luck I can head off others who might think it's a good idea.