Okay, since I’ve been seeing this in a few places and some people have also emailed me about it, I’ll post about it.
1) The 311 raw says Ice, reads Ice. It does not say Water but pronounced as Ice. Nor does it say Ice pronounced as Water. It’s just Ice, koori, 氷.
2) It does not say Water, mizu, 水.
3) Akamatsu said it was a typo, and should in fact have been the aforementioned Water.
Thank you all for your time.
EDIT: And finally remembered to change Ice spells to Cold spells on the Spells list. Probably more sensible that way.