I have a problem with my blend mode drop down box, the one in the top bar next to brush size, I have overlay and multiply and everything else but "normal" do i have to reinstall my software again or is it something I am missing or not doing, is there someone that can answer this for me?
On the options bar for the brush tool, there is a little arrow, top left. Click on that, then reset the tool. That may fix it.
Another thing to try is to select one of the modes, then use the arrow keys on the keyboard to scroll through the various mode options. On my system, "normal" is the one at the top in the list.