Yep, oversized or too many units cause short cycling where it will cool a space too fast and not run long enough to dehumidify. Better to have one or two units runs longer than 3 running shorter. Improper sized HVAC's and short cycling is one of the primary causes of mold issues in homes. Especially newer construction where code enforcement is lax in ensuring proper size vs load. Add to that; the AC sits in an unconditioned space and creates a low dew point. (AC and ducts in a really hot space creating really cold air). I am amazed that HVAC systems aren't required to have humidity monitors and run accordingly to arrive at a desired humidity. My guess is the EPA doesn't want that to limit energy consumption. I am also amazed that there aren't building codes to require HVAC units be placed in conditioned spaces. This is not only way more efficient, it lowers humidity generation. Not practical for RV's I get it, but certainly for homes. Anyway - another topic for another day.