I may be missing some thing simple, but when I create a feature service hosted on ArcGIS Online it's features are all lost. However, the tiled service works as expected. I would like to ultimately have a tiled service for labels and a feature service to support pop-ups.
I was able to successfully publish your data as a feature service (I didn't simultaneously create tiles, however). Perhaps there was a temporary problem with the server? Maybe you can try again...