To the first I will say what I said already. We should have separate sign-ups. One for the men, one for the women, and one for the tag teams. This would allow us to see if the tag and women's divisions have enough people to be a thing. If not, then we won't have them.
As for the belt, Jet said the old "Women's" title, not "Diva's", which leads me to believe he is talking about the one that Trish and Lita feuded over.
I agree completely. The biggest problem both TWF and EIF had with tag titles is that they followed the same rule as the world and minor, being that you couldn't hold any other belt if you already held them. Therefore you will be allowed to hold the tag titles with one other title. As for the double booking, I guess that is the consequences that go along with deciding to pursue multiple championships at once. However, I will add in a stipulation because of that. First, if you are not a champion, you cannot challenge for a singles title as well as the tag titles in the same night. And second, if you are double booked for a singles title and a tag title match and you show up for one match but not the other, then there will be repercussions (which will likely be a reversed decision in the match that you did show up for).