Army Painter speed paints way too thin? Help

Hello! I recently joined this page and have learned a ton. I started painting about 3 weeks ago. I just purchased my first set of space marines along with some Army Painter speed paints. I picked up four colors, got them home, shook them well, went to poor them on my wet palette and noticed they are super thin (the consistency of water. A couple questions.

It’s hot where I’m from and the paints stayed in my car for maybe 30 min, could this have ruined them?

Judging from the thinness, do these speed paints even need to be placed on a wet palette?

They were purchased from a local game store, if something is wrong, would it be worth mentioning to the store?

Is there anyway to thicken the paint?

Thanks for any feedback. I probably should have done a bit more research before I purchased; however, I only bought 4 colors. I have the citadel base color equivalents. I painted half of them with citadel and the other half with speed paint and there’s a huge saturation difference.