Issue with the avengers tower

I am currently building the tower and i have an issue, the grey pieces dont hold onto the marked studs (this happens on both sides of the tower). Ive tried pressing them in but they end up holding on very loosely or popping off. Ive been trying to find a solution to this problem but i found nothing on the internet. i can fix it by adding another stud on top of the original stud but im looking for a way to fix it without using extra pieces submitted by /u/mqtherdeath [link] [comments]