Wing/Vent Windows

Recently purchased weatherstripping kits for my doors. This includes the vent windows. I removed the driver's vent window assembly and put the new weatherstripping on it. I took extra time to make sure every groove and channel was locked in and snug. Reinstalled the glass and decided to test it prior to placing it back in the vehicle. It leaks around the top corner of the glass. Running my finger along the edge, you notice a decrease in pressure along the seal from the bottom near the locking handle, upwards.

Is there some way to adjust the tension? Is there some trade secret to installing this stuff? The old weatherstripping for the window wasn't bad, but since I replaced the rest, why not this. I didn't bother with the vent window on the passenger side yet as I couldn't manage to get this one right.