HouseJackBuilt

For further information I am running a X15.

How do I keep my wall heights from reverting back to default? When I build a garage with 12ft high walls, then when I build the 2nd floor - it brings my first floor garage walls down to default 9ft walls. I had this problem when I did an addition. The walls in the original house were 6ft high, when I worked on another part it brought it back to default. I was unable to fix it then too. I'm sure it is something stupid. Thanks, Jack