The stroke order of 椅　seems strange, is it just me?

I turned on the stroke strictness to the maximum,

before completing the box, it wants what should be the last stroke, and then finally complete the last two strokes of the box

are there different styles of stroke orders, like how the thread radical is drawn differently?

Fixed it; was just a typo in the Japanese version of that character.

If you find further mistakes, you can easily let us know with the "feedback" tab on the practice page--it has an option to send stroke order corrections for this sort of thing.

Some rules for Japanese stroke order are here:
http://www.skritter.com/stroke-order-japanese

Ah, cool!

Sorry! I didn't realize there was that feedback for those things, I would have rather said something there

also thank you for the page on the stroke order rules, its handy :)

oh and by the way that was super quick!

:O

No problem!