This does sound strange.

Either it was wired incorrectly from the factory, or there is a hidden battery somewhere. Shouldn't be power to anything, except maybe bilge pumps, with the house battery disconnected. With the battery switch to "on". 

22 minutes ago, dms said:

Damn!  Do you do training?

I raised most of them...

34 minutes ago, Ronnie said:

[...] because my crew knows the process when we come back in. They are on it with cleaning, wiping and covering with the factory cover. 

Damn!  Do you do training?

22 minutes ago, Weaklink said:

not sure about 2' but 1' was fine. I have a 24mxz cover on my 23mxz. You could email dallas canvas or call. He was pretty responsive.

Actually your 24MXZ is 1.5' longer than the 23MXZ. I'd still call Dallas Canvas and ask about fitment.

It works great as a temporary cover or a cover under a covered slip. I wouldn’t use it as a cover out in the open unless it’s just short term. I got it as a cover for when we go out every few days to quickly cover the boat on my lift. It’s quick to cover and so much easier than a factory cover. I just don’t use it, mostly because my crew knows the process when we come back in. They are on it with cleaning, wiping and covering with the factory cover.