One pitch Strikeout?

[FUBLUE]

I was UIC for a tourney the other weekend, and I had an umpire "bragging" about getting a one-pitch strikeout. here's how it went down:

Called strike one on first pitch. Batter step out of the batters box.

She steps back in, smooths some dirt, and kicks some dirt on the inside line (not erasing, but getting "a little dirt" on the line). Called strike two for erasing line.

She steps out to ask coach what is going on (14year old girl, B or lower level FP) and blue calls strike three for stepping out of the batters box.

Is this a misapplication of the rule or not? Blue tried to tell me that I, me, the UIC, said it was supposed to be called this way in a HS clinic...I don't think so!