It will allow the same address twice. It will actually allow you to sign multiple times so long as you clear your cache and use a different email, as well. So there you go.
I've tried to do it on tym, but for whatever reason I just can't finalize my registry there and mk official boards won't let you post petitions. But If you guys know others, please help us out!
He said he'd write it. I'm waiting on him, and I'm assuming this will take some time (probably like 6 months) but as long as we can get confirmation that it's gonna happen, I'm happy.