Yeah. The check on the stand is for checking WOT jetting. To check WOT jetting, it has to be at WOT. If its at half throttle, then you are checking half throttle jetting.
Half throttle should also get to 10000 rpm. I would hope you can get somewhere approaching 9000 rpm in gear. That means half is too rich as well but this will come down as you reduce the main jet. So, still too rich.