[summerangel]

I haven't used one of these myself. But I'm sure I read somewhere, where you need to use a separate thermometer and hygrometer. As the one on the unit isn't too reliable.
Regarding the water question, yes, if it was me I'd put a pot of water in there, you,l need this for the humidity.

Have you dug the eggs up yet? You could get them out now and sit them on vermiculite (make a little dent in the vermiculite ) then put the tub in a coolish room for now. Think they will be ok for a week, but the sooner the better in the incubator really.
Hopefully someone who has experience with this incubator or someone with advice will be along soon.