That's weird, I can't get it to match the UID. I'll keep trying.
This simply means that you are entering a wrong root key.
If I import it into armory, is there anyway to check in armory if the wallet ID is matching?
You can try it. But it should generate the same address and the same ID.
A question:
Have you backed up the wallet yourself or it has been done by someone else?
I hope someone isn't trying to scam you.