Sometimes it looks like I should be starting close enough to the first stoke, but it fails anyways. I think this is only an issue on iPhone. Probably something to do with screwing up the pixel density calculation.
It would be great to know how long it takes a kanji to go from Aka-chan to sensei. I found I had a bunch them at Tensai and I was wondering for what felt like a long time, "how long will it be before these show up again?"