Hello.
Yes, this is how it should look like. Providing night lighting for all downtown buildings was not possible
in this case as it would require an anormous amount of work never payed back, sorry.

This is probably why non of the Aerosoft's
US Cities have night lighting at all and the only scenery I know which does have it done perfectly is FlyTampa's Kai-Tak, but this is a different story. In our scenery you have night coverage for the whole ground, highest buildings in the downtown and all included airports. This is also what is shown on the screenshots of the product
HERE and on Simmarket where you have purchased it.
On the other hand, if you find some night (not evening!) photos of Miami, commercial skyscrapers are not lit since nobody work there at night. Only the very top buildings are lit...
http://www.skysailcharters.com/images/nightlights.jpg
http://farm4.static.flickr.com/3185/237 ... 265bd4.jpg
...and most of them have night textures in our scenery.
Since we are talking about some technical details, let me say a few personal thoughts about the project, which are nowhere mentioned. It is true that the city buildings part was bought from an American company with no guarantee of a possibility of converting all the scenery to use in any FS. Taking into concideration the number of the included 3D objects it was close to a miracle to "rescue" the project and make it compatible with GMAX and later with FS2004 and FSX. It required some bizzare actions and I would not do this again for sure

. The worst thing was no sure if the whole project is going to be usable at all. The whole process took a few months and concidering the amount of work put into this project, I am satisfied with the final result very much, although I am sure some of customers will not like it or want 2x more buildings with 2x better framerates or 2x better ground resolution with 2x smaller installer file etc. Sure we care very much about our customers but we also need to think logically in terms of what is possible to produce and how much time would it take. FS is not a car simulator so there is no point trying to drive on the roads of the city. The project is designed for flying above it at the allowed altitudes and areas and this is when it will look realistic.
BTW FYI this scenery is not certified to use with Prepare3D yet.