Why is this happening when opening a plan?

[decogirl]

When I open up a plan, the floor seems to be "floating" In the first picture, you can also see that the stairs appear to have extremely large risers as well. When I open the specification box, then close it again, the stairs appear normal again. On the second picture, you can see that the second floor is missing a floor. All the rooms on that floor are like this but this is the hallway. When I open room specification, i change it to "open below", close it then re-open it and change it back to "hall" then it goes back to normal. I have also included the second floor in dollhouse view for you to look at. This has been happening with every AHD plan I've made. But when I open the plan in Interior designer, it does not do this. Any ideas?

Thanks,
Laurie