Help airbrush Question.

Hi all,
I recently bought a paasche double action airbrush (v).Surprisingly i only paid $26 for it.I thought i was buying a single action one but i received this one instead.I have opened it and i have found that i the colour cup and jars dont fit the side fluid hole that well.They just about go on but they dont seem to go far in and it doesnt seem that sercure.Is this normal with paasche airbrushes.Have i gto the wrong colour cup for this paaschr model??.

Any help would be much appreciated,

Andy