I just got a new floor pump and MAN is it hard to get it off the valves! It's a Serfa pump with dual heads. I tried it on my presta and schreader valves and have the same problem. I flip the switch (yes, in the proper direction!) to release and have to tug and tug before it comes off the valve. I also noticed that it is really hard to get it on the presta properly, so that the air guage registers. Am I just a pump dork or should I return the pump?

I also noticed that I feel no pump pressure until the handle is all but 3-5 inches from being pushed in all the way.