I suspect it's someone developing an auto-uploader. They're ony submitting tutorial problems.
I wouldn't want to use my account for that purpose, since it floods my submissions and skews my stats. This site is about learning and growing. Hiding your WA, TLE and etc only cheats yourself. The only thing that I consider cheating is giving someone else your code or deliberately submitting someone else's code. The scoring system is slanted towards submitting current problems being worthwhile. The editorial staff has been doing a good job of keeping the poor problems to a minimum so that the new problems are good problems.
Cheers!