I have multiple buildings in a single model for a LEED Group certification. How is the baseline system type determined?

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I've modeled four buildings in a single file in eQUEST. They're small (the largest is 12,000 square feet), so individually would fall under system type 4 (which is how I've modeled them). The buildings will not share any systems when built. I wanted to confirm that using type 4 is correct (because I've modeled similarly-sized offices that were on opposite side of gigantic warehouses and LEED reviewers insisted on one system type 6 for the whole thing. Granted, it was still one building).

Additionally, my fan loads seem high, though my schedules and outdoor air are as they're supposed to be. Any quick suggestions on things to check, or should I expect high fan loads with system type 4 in a cooling-dominant climate?

Thanks!