i just noticed that, when i close my door, it doesnt close all the way, i can still push it hard and it still moves, when i open then SLAM it close, it still happens. its not like when u close it half way and it moves a lot, its like 90% closed, but u can still push it in.

 

hmmm. Im sure somebody will post something more helpful but I would take it to a trusted body shop and have them look at it. Usually its something with the hinge ie: something stuck (spray with lubricant) or an adjustment needs to be made where the catch engages.

Some vehicles get door lag. Happened with my truck, I took a jack and jacked up the bottom of the door farthest from the hinge (using a piece of wood to protect the metal) and would let it back down check the door and did this till the door closed oh so perfectly.

 

Try adjusting the position of the striker in the doorjamb.