Facebook and Twitter setup

I've wasted a morning trying to figure either of these out with zero luck. I know I need to create apps (managed that with Twitter OK, but FB is a total nightmare - I don't think they could have made it more convoluted or difficult if they'd tried).

I get this error when trying to connect to Twitter even though it's a brand new app:

The request token for this page is invalid. It may have already been used, or expired because it is too old. Please go back to the site or application that sent you here and try again; it was probably just a mistake.

FB gave me errors on an older app so I went to try and upgrade using a link saying it's their upgrade tool - didn't exist. Gave up, made a new app. Gave errors about some permissions not being submitted. Just clicked OK then EB says I'm connected to FB. Have not posted yet so no idea whether it will work or not. Then I see that the permission is only good for 60 days then I need to renew with FB. What sort of total BS is that? Is there a way around this? How does everyone else handle this? Or is it I've just done something wrong?