Your plant looks the spit of what we've been getting as itinerans in the UK for I don't know how long.I've had mine for 3 possibly 4 years now and they've been around longer than that I'm sure.And they definitely pup from the corm right next to mummy.
Andrewinholland has just posted up some pics of his itinerans flowering over on gote
growingontheedge.net :: View topic - flowering itinerans and zebrina
Looks an exact match wouldn't you say?