Oddities

This is a strange Great Depression era cover that I can't figure out. Although it is a business reply envelope marked as no postage required, there is a 10 cent special delivery stamp plus 4 cents postage due. It was postmarked at 4:30 PM onJune 30 in Akron and then again at 9 PM in Cleveland. Does the marking "Fee Claimed by Office of First Address " mean that Akron collected the postage due, even though the precancels have Cleveland? Under what circumstance could this usage of stamps in this manner be rationalized? The cover had no contents when I acquired it, although a knife opener broke the envelope seal at the top.