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You are not wrong. Some GM's think quickdraw should count as an action, but I think it should count as an action only if the mnv is failed. Draw and throw are one single action done fluidly with a successful quickdraw...of course, the roll to hit might miss!
Three throws in a melee could occur this way. I find its best to assign a -20 penalty for each quickdraw attempt after the first to represent the incresibg dificulty of draw and throw so quickly. Even so, I have seen a hobbit thief PC be good enough to succeed at three draws and throws most of the time by 7th level, which seems about right to me.
For clarification, snap throw with quickdraw and 40% action attack (QD skill check at +0, attack at -20 assuming declared target, -40 if react and melee), normal phase QD at -20, attack with 30% action (-20 OB penalty with declared target, -30 penaalty with react and melee), deliberate phase QD at -40, attack at -10 OB with declared target, -40 with react and melee).
You may want one attck to suffer an additional -20 for use of off hand to throw with, meaning you force the PC to make one attack with his off hand.