Strange pitching motion: balk or no?

[jTheUmp]

Thanks, umpjim... it looked exactly like Cliff Lee's motion in the video below (only this kid was right-handed).

So I should've balked him then... (this league is based on FED rules with modifications: no pitcher's mound, 75' bases, 56' pitcher's plate distance, etc)...

I didn't, for 2 reasons:
1) wasn't sure if it was a balk or not.. had never seen it before and didn't want to tell a kid he couldn't do something that he was actually allowed to do.
2) The other team was having a field day stealing bases on him because of his motion. I figured, if this pitcher is ok with allowing 2 stolen bases for every runner, who am I to argue?