Without seeing a screenshot i can only hazard a guess but... Could this be an issue of lining up the driveway with a road?
In my experience, the game re-orients the buildings until the correct edge of the building site is facing a road (if there are multiple options, then the building can be rotated to face a different road).
As a general rule (its not an official rule as far as i know, just a rule i use), when looking at the specialisations screen... the edge of the building that is at the bottom of the screen (or the edge that is closest to you) is the edge that MUST face the street.
