I think it works as it should, too. I mean, I think it works the way Capcom intended it to work, but I would have rather it worked differently.
In training mode, it seems stupid to me that anyone would even need to turn on the option to use a game mechanic more than once per training session. Though, even then, it wouldn't be a big deal, if there were also a third option to stay in x factor for as long as you wanted. Training with x factor has an annoyance factor added for no reason, because you have to turn it on every 10-20 seconds.
To me this just seems like one more small thing Capcom did wrong, and small things have a way of adding up after awhile.