If you look closely at the footprint, the "human" heel is over the right digit of the "dino" while the "dino's" middle digit is over the middle part of the humanish foot. Explain that.
If the dino print was made first (in pretty viscose mud) then the humanish print was laid down on top you might get what is shown.
However, that brings up a big problem. If the mud was viscose enough that they dino print went down only what looks like a couple of cms how did the smaller print get in so deep?