A lot of it is your typing styles. I've just got a new keyboard and despite them being from the same manufacturer they have distinctly different feel to the keys. After about 4 weeks I'm finally getting used to this one, although I still make errors.
Just to make sure try connecting your keyboard into another USB slot. You can also try uninstalling the keyboard, shutdown the pc, unplug the keyboard, then re-start the pc. Once the pc has booted up plug your keyboard back in.