Hi!
Expecting father here! 
New to this website but someone recommended I ask the question on here.
I'm very sorry if this has already been answered but Googling and searching keeps coming up with conflicting answers.
I have a Stomp V3 Isofix and car seat and I've installed the isofix base into our car. Everything is green and there is no side-to-side wiggle, but the entire base lifts upwards.
I can wedge the handle into the seat to stop the movement but not enough for the handle to click into place.
Is this all normal, I understand that the base pivots on where it clips onto the car so it makes sense in my head but is this unsafe in any way?
Some website/threads say it's normal, some say it's not which is leaving me a bit worried!
I've tried multiple isofix bases (forgot the brand for my mother in-law's seat) and they both did this.
I've tried clipping to different seats, fully pushing everything in as hard as I could to no avail.
I'm wondering if anyone else has this "issue" or if it is an issue at all. I'm fitting this onto a 2012 BMW X1 if that makes any sort of difference.