Sims 3: Exceeded your quota

[Ethelfrietha]

Hello!

I recently made three houses, each on one of the tiniest available lots, and I'm trying to upload them to my account from the launcher. Every time, I receive the error message:

"You have exceeded your quota. Please visit MyStudio and delete some items."

I have only three uploads at MyStudio. I deleted one (a family), and then I was able to upload one of the lots, but still not the other two. Does my quota really consist of only three items?!

Thank you for any insight!