What causes this?

When I installed this I made sure I torqued the bolts int he correct sequence and to the right torque. I'm getting ready to install a new diaphragm style clutch ,and wanted to make sure that there wasn't something that I was missing that would cause this. It isn't exactly a high quality clutch. The old clutch was a 75$ unit from Checker (Oriley). It did seem like no mater how I adjusted the throwout bearing I had to push the petal all the way to the floor to get it to release.