Benice, it is only your opinion that there is strong evidence that the two sightings were of the same man and child, the actual evidence says otherwise.
What evidence would that be please?
IMO there are far too many similarities in the descriptions for it to be put down to coincidence - particularly the observations from both JT and the Smiths that the man did not look like a tourist, the child had bare feet and was wearing light coloured trousers possibly pajamas, and was not covered by a blanket even though the night was chilly.
I'm no mathematician, but surely the odds of it being two different men - both being around the same age, height, build, colouring, and wearing similar clothing of similar hue, both carrying a child, uncovered, with bare feet and wearing light coloured trousers, both in the same area, on the same night within the same hour, and both deciding not to come forward must be absolutely phenomenal?