Sure, I'd be glad to help. I see that you submitted a case yesterday and is in the queue to be looked at, the next business day. Although we are closed for the weekend, we usually respond to emergencies any way.
As for the sensor that isn't joining, have you tried to pair using the alternative options displayed on the add Zigbee device page? This doesn't sound like there is a problem with your hub, but nonetheless, we will check to make sure your hub is functioning properly.
