I looked around, and I don't "think" TMC offeres static. But since they have so many sub devisions, I'm not really sure. I know their buisness accounts offer them, but really either way your paying more for a second IP, so its better if you can set up the rules.
Also, most network devices have two IP's. The Public one and the Private one. Think of your router as having a brick wall through the middle. On one side of that wall, the internet can see everything. Thats the side of the wall Time Warner givers your router a IP. On the other side of the wall are all the IP your router gives all your computers. NAT is the process your router uses to let people on one side of the wall talk to people on the other side of the wall without they actually seeing you. If someone on one side of the wall is having the exact same conversation(or close enough) to the same person on the other side of the wall, the person you are talking to(WoW) is going to get confused. When your router senses this confusion, it thinks its WoW messing up, so it blocks the connection, and sometimes even locks out as it tried to figure it out.
Anyway, we all gotchya back. The remote IP could be the IP to your game server, but you could also do a range to include all the servers, since their probably pretty simular. That way you can switch servers without any problems. **Speaking of which, do you two play on the same game server?** What happens when you don't? I bet the problem goes away? Maybe not though, if WoW has some sort of gateway that you hit before your game server. Also, another way to check is to be online, look at the Status > Internet Sessions, and then start up WoW and see what IP pops up. That will tell you just about everything you need to know. Will make the Gamefuel alot easier to set up.