I am wondering if they are questionning that you counted salads as a side. Often times salads are served before the main entree, not as a "side". Also, salads are often served soley to the individuals who ordered them (as opposed to being shared, which has a set of standards about allocating and what not)
My thought is of coures just a guess (not knowing the shop you did).
In general I find them easy to please, and very much willing to work with you to create an accepted shop. Did they actually reject the shop or just remind you for next time?