permit FC queueing for Frontline

[Fyce]

I'm a member of an FC that's allied with Twin Adders, I am personally aligned with the Maelstrom, aren't I *technically* enlisted in both then?

I don't see it like that.
FC's registration to a GC is an administrative choice, and not a military one.

You, on the other hand, have to support and fight for the Grand Company you choose, giving it supplies and equipment while being able to exchange seals for goods provided by said GC.

In short: you really are fighting for your GC while your FC doesn't.
Therefore, it does actually make sense for you to fight in the name of your own GC rather than your FC's GC.

Plus, I'll add that Free Companies are, obviously, "Free". They just have to be on a GC's record to legitimatly be recognized on Eorzea, but their actions depends completly on their will.

The power of GCs on the FCs barely exists, while the bond between you and your GC is much stronger.