If you are pulling the outside handle all the way to the left, maybe multiple times to open the door then one of the latches is not synced with the other. You can check this by opening the door and flipping each door latch by hand to the closed position, with the door open slowly operate the outside handle. Both latches should open at exactly the same time. If one opens later than the other that latch needs adjusting. Usually it is the bottom one that causes the most trouble. You can do this check before you take the door apart. Once you determine which latch is off then remove the frame of the door (and you don't have to remove the window screws or the whole frame) to fix this. I removed the dead bolt, the screen door catch, and enough screws from the frame to pull the cover off the door to allow me to get to the bottom latch rod. I used a stubby 7/16 wrench and turned the rod adjustment screw a half turn at a time until the latches synced byack up. When you put the door back together make sure if you removed the dead bolt to re-install it with it closed, not in the locked position, or the screw holes will not match up correctly.
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