I don't know if you have a key from a previous edition of the area, or if someone just miscopied them. Not all DMs may realize (or have been told) that to copy keys, they can't just use their clone wands, because that breaks the keys (it specifically tags something as a copy, for other reasons, which means copy keys won't work). Instead you have to clone a bag with the keys in it, or clone the PC/NPC carrying the key item. Eve can give you a new key if you need, though.
As for why the guild itself is semi-inactive, well, that, like pretty much everything else to do with the activity levels of any player guild or group, is entirely on the players involved. The position of the Admins/Staff is and has been that that's exactly how it works - you all decide what you want to do. If you want to replace your leaders, or start a new guild, or rename the old one, change it, etc, we're not going to stop you. Step up, take charge, take initiative. If the players want to change the guild to the Pretty Pink Princess Pony Academy of Cormyr School of Witchcraft and Wizardry and make it a My Little Pony/Harry Potter Hogwarts fusion clone, I won't stop you.
...now, I
may will mock you mercilessly, but that's another matter.

Don't like the leader of a guild? Think they're not on often enough? Step up, take charge, start doing things. Don't wait for permission. This doesn't mean stage a forum coup outright (well, it might, but I'm not going to say all situations are the same), but it means be active and get things going. Pretty soon everything else will fall into line, and we'll back up whatever the players are doing. That goes for if a sergeant wants to take charge of the Purple Dragons, because nobody else is, or some mage wants to step up and actively run the VF, etc. If other players are around from before, and want in, then let them get active too, and roleplay it out, but we're not going to "protect" old or former players' positions just because.
Bottom line - these factions were formed because of player interest and activity, and it can remake them, change them, replace them, whatever. The only thing that truly ends them is lack of anyones' interest.