You also have to be careful with 240 single phase loads on that setup. Be sure it is using the 120/240 transformer not the stinger leg ... for the same reason. We used to run into that problem in computer rooms that were on delta services. If you can keep your single phase loads balanced around the phases you can get away with it but if they are lopsided AB/BC it can screw up the balance. (assuming orange is B)
