This seems to be broken again in 1.9.4, I tried '/testfor @e[type=Item] {Item:{id:minecraft:sand,Damage:1s,Count:1}}' next to some dropped red sand and it gave the error message 'item.tile.sand.red did not match the required data structure'.
Same happened to me.
Just got my realm 2 days ago on a 30 day payment. Me and my brother were playing for several hours. We built a house, went mining and so on. Then I closed the server for the night and in the morning I logged in to the same world and there was no house, no mine and all it had saved was me chopping some trees. I downloaded the latest auto save but that was the same. I am very annoyed that my money has gone to waste as we don't want to do everything again and I will be cancelling my realms at the next opportunity unless this is fixed.
I'm finding now in 1.11 there is a disproportionate number of cartographers compared to librarians as well: there seems to be MANY more catographers than librarians which is really frustrating!