Ultimate Facebook autopost is only intermittent

Hi there

My client is having a few troubles with Ultimate FB plugin

1.
It is only posting intermittently.
We have been watching it and can't see any rhyme or reason to it.

I've found that if I change the slug and update the post then it will send to FB, but obviously this is only a temporary fix, and we need to get it working as it should.

2.
It also doesn't always post the image when it does eventually post to FB

3.
The next issue we're having is that the client keeps needing to grant extended permissions. She hasn't changed her FB password.

4.
.... and lastly - she's wanting to re-publish to FB once it's already been sent - how can this be done?

Am happy to supply login details if someone could take a look and get it sorted for me please.