Awesome... dns is fixed.
Turns out, there was a problem with a TXT string:
__base__ TXT - v=spf1 a mx ~all
Some of the domains had it, so I've removed manually one by one and checked all of them, then started bind and it functions now
Now...
all of my domains go to the same "default" page, that's my main website. Shouldn't be this the behaviour... going to dig it a little more...