Also it may help to check out the sail plan for USS Hornet or USS Wasp. They are War of 1812 era sloops of war which were designed as brigs but had a mizzen mast crammed on the stern during construction so most of the sails and rigging especially for the forward part of the ship are identical to what a contemporary brig would have.
American ship-rigged sloops are different from brig sloops, they were intentionally built that way, not suddenly redesigned during construction.