C'mon, do I have to wait for a whole day to post two more image submissions?!

Nope. Same here.

What I would like is an opportunity to carry over unused submissions. Perhaps if you don't come on one day, you get to use the submissions you didn't use previously - sounds fair to me :)

It takes a while for ideas to come to me, so I don't mind at all. Plus, it's a good anti-spam feature like the person above me said.

I agree with eyeheartlamp. Of course there can still be an overall limit, but two submissions a day sometimes usnt enough.