I have managed to get a deck on the upper level of this plan but can't seem to get rid of it. i can no longer see my ceilings, only the bottom of the deck above. This is a houseboat where the upper deck is the fiberglass roof. i was trying to create a "deck" to show the railings on the roof and to add the bar, etc upstairs. I am at my wit's end as i spent so much time on this plan before i realized i have gotten into a mess i can't figure how to get out of. any suggestions would be so helpful.