new Windshield install, weather stripping at bottom secure?

I just got a new windshield installed and was wondering if the bottom plastic piece that houses the wiper blades and weather stripping at the bottom of the window was suppose to flex at all or be sealed to the windshield. If someone can push on this location and let me know if it flexes or moves id greatly appreciate it. I uploaded a image of where im talking about. It actually had slipped under the windshield when i pressed on it accidentally. I just don't want water getting down behind it and into the cab somehow cause it sits just behind the engine compartment.

 

Yes mine flexes too. I accidentally pushed down on it when I was washing my truck.

 

AWESOME!!!! thanks for checking man, i accidentally pushed mine down when looking at the new windshield and when it slipped below the the windshield i had a WTF moment.

Thanks for putting my mind at ease