It's a 5 image upload limit per 24 hours. And if your LO is in 2 categories (Member Galleries (MG) and Sugar Free Challenge)...that counts as 2 images.
So 5 images lol. You are just a proficient, scrapping machine. So you will be clear to u/l more 24 hours after "You had HOW many?" had been u/l...if you remember when that was.
Also...if you are u/l to a challenge gallery (or designer gallery)...it doesn't have to go in "members gallery". When you click "My Photos" all your LOs will be included even if they are NOT in "Members Gallery"