Sounds to me like your dogs are "playing" you!
I have had the same issue over the last few months. Keymo's reasoning for getting up wasn't hunger, it was to go out and pee most times, other times I think , just because he COULD get us up for some company - he did.
Think of when you're sick with a really bad cold. You wake up in the middle of the night to blow your nose, take cold medicine, pee - whatever.
Maybe it's around the same time of night. You know - your nose is now stuffed or your medince has worn off.
So you get up.
Let's say it's 1am.
A few days of this and even though you feel much better, you can't seem to break the habit of getting up in the middle of the night around 1am.
It's simply that your body has easily developped the HABIT of geting up at that time. And you have to break yourself of it.
Maybe the next day you stay up really late, so that you're REALLY tierd, then you actually sleep through the night.
Guess what ? Bad habit broken.
The same thing happened with Keymo. He got into a BAD habit of getting us up around 1am to go out for a pee. I think it started one night when we had a thunder & rain storm.
He woke up and of course, needed to go out to pee.
So we took him.
Over the next couple of week, crap if we didn't have to get up every night!
Finally - one night he woke up and barked as usual. I said - Keymo goodnight go to sleep.
And we ignored him the next few barks.
He went back to sleep.
Bad habit broken.
Sounds easy. It really is. Just ignore them trying to wake you up. Don't say anything to them if you have to. Don't let them know they woke you up.
If they don't succeed they'll stop trying.