Yeah - I had a Joe Blow from TJMaxx, too. Loved it for 2 or 3 years, but my DH and my best buddy both had trouble with it - found it very confusing, and refused to use it after a while. I never saw the problem - seemed perfectly clear to me. But then the head fell apart (literally). It would fall apart in my hand when I took it off the valve, and I'd pop it back together. Until it finally shot one part into orbit somewhere.

So now I have a nice Park Tool brand floor pump, just like my DH's. And he and my friend don't get confused anymore. I did rather enjoy being the only one who could figure out my pump.