Novablast bugged?

I use 400sec Novablast on my Orcruiser, it sacs the last monster in my team.
I swap Seahowl to the end of my team and use 400sec Novablast on my Orcruiser, it sacs the last *two* monsters on my team.
Known issue?

It would only let me use it once. Stating that it was only once per battle. Was using a friends.

Yeah, had the same issue. I had Orcruiser and Cryowyrm out, with Wolfrozen as the last one in my lineup. I made a spare Cryowyrm, which was added to the last of my lineup, then used the 400sec Novablast. It sacrificed/killed the spare Cryowyrm and the Wolfrozen. 

Yeah, this seems to happen to me too - with my Warca, last 2 seem to be sacrificed instead of just last one