[Raapys]

then possibly I'm not getting any from my allies because they are busy resupplying their own ships? I find this strange because they dont have any ships in the system.

None at all? Note that launched fighters( I think, anyway), satellites and bases also counts. I've not tried it myself, so it could be that it's actually not working, but I think it's more likely that there could be something you've overlooked in his system. Remember that you might very well not be seeing all the forces he has in that system.

So I have a non aggression treaty with no details which is a bug? And that's why it wont let me enter my ally's planet hex?

Actually, you *don't* have a non-aggression treaty. No details = no treaty. It's just an interface bug sort of. And since you don't have such a treaty, you can't enter his planet hexes without using the 'Attack' command.