Playing last night I bought 2 holograms to use on geothermal plants (that hadn't been built yet but I had claimed the tiles). So I used the holograms on the tiles and the hologram marks them as invisible. Cool. I was figuring they would stay invisible (that's why I bought the second one!). When I actually built the power plant though it changed to a hologram of....a GEOTHERMAL PLANT! Please fix! Pretty sure the idea wasn't to mask a geothermal plant by disguising it as itself! 
How is it generally supposed to work? Should it have stayed invisible or does it change to something else after the building is built?