That’s not quite correct. The A-26B could fit as many as 7 hardpoints under each wing, for a total of 14. Mostly those hardpoints were used for 5″ HVARs. This was a common setup in the Pacific at the end of the war, during the Occupation of Japan, and on into Korea.  If they didn’t have 7x rockets per wing, they would often carry 4x rockets and 1 Napalm bomb per wing.