ok yeah it appears you need to get a sig working then once you do it does update after that...
That's exactly it.
Though it'd be quite funny (and confusing) if every post kept looking the same way as it was first posted (unless edited). You'd get a lot of different signatures for some people.
TOIVA, Toi Vaxx, Toia Vix, T'vritha, To Vrax: Bring in the Allegiance class Toi'Va, Ti'vath, Toivia, Tia Vex, Toi'Virth: Add Tier 6 KDF Carrier and Raider. Tae'Va, T'Vaya, To'Var, T'Vira, To'Vrak: Give us Asylums for Romulans