I'm literally trying to put a trade on at 12.5 cent to clear up...

I'm literally trying to put a trade on at 12.5 cent to clear up the volume, tried at 12 cents as well, market keeps automatically deleting my order, how stupid and manipulated is this shit, also can't place any sells and the commsec reasoning is so BS, has anyone noticed these guys cancelling your orders and messing with your shit. Something dodgy must be going on, can't even place a fair enough buy order, and I'm guessing others can't either.