So it’s as I guessed:
Although you’ve also added textures to the faces themselves. The face materials will override the materials applied to the group or component container. So if you want to change the material, you need to get in an paint the faces.
Enitiy Info is useful here. With the counter top component selected there’s one material shown.
With the component open for editing that the top face selected, there’s a different texture applied.
Save with the doors.
The floor because the faces are reversed shows you’ve applied that texture to the back face.
Get in the habit of painting faces, not component/group containers. This gives you better control over the appearance of the materials (you can change the orientation, for example) and it helps you create a cleaner, more consistent model.
By the way, it’s kind of odd that you have 10 cabinet doors that are all the same size and each one is a different component. I’d make them copies (instances) of the same component.
I’ve removed the component/group materials, replaced the doors with a single component and purged unused stuff from the model.
Garage1.skp (5.5 MB)
While I think the subject of your wallpaper choice is lovely, I’m not so sure I’d want my garage papered that way.