Cyrodiil is doomed!, unclosable gate! Options

[Joryn]

Im having a slight........ major problem with the MQ. It seems those crafty buggers in downtown Oblivion have managed to create a Joryn proof sigil stone. Since Im the only git in all of Tamriel who can close these darned gates (with everyone else being useless, ya know ) Tamriel doesnt have much hope when the Daedra create tamper proof sigil stones.

What Im really trying to say is Im trying to close the Oblivion gate near Anvil for the MQ but it seems the sigil stone is there, but I cant interact with it. Nothing appears, no name, pick icon, nowt. I was wondering if anyone else has encountered this problem and has a way to deal with it? Im on 360 so while any pc help is appriciated, it is also useless.

Im not of the mind of starting over again, but it looks that way as all my saves are after entering the Oblivion gate. While it helped me through the 360's freezing, it looks like I am now stuck with an unclosable gate. But like I said, any help or tips would be appriciated.

I have tried:
Reloading (obviously)
Leaving the plane and re-entering
Closing a non MQ related gate in the hopes that it might somehow jog this rogue sigil stone back into being an object.

If there is some pointer I am missing in this, I will be very grateful and embarrassed if anyone could share it with me. Thanks muchly.