Does anyone have an explanation for this? Others have told me that they have the same problem...my GH shows 1926/2000 items with 24/150 in the crate, 206/210 in the yard, 7/12 pets and 0/0 in vaults, but when trying to place new items I get the "real estate is full" message.
If that is on test you could make a bug report under test forums. Maybe its the latest guild hall bug? Haven't seen it happen on live or maybe just no one said anything.