In the last episode, the Dinobots have flown on their own. Here, they need jet-packs to fly.
The dinosaurs in this episode are gigantic in size, to such a degree that even the huge Transformers seem to be about human-sized next to them. A Tyrannosaurus even picks up Dirge, a plane-sized robot into its mouth. To do this, it would have to at least be as big as Godzilla. Both the Transformers and the dinosaurs should be about of the same size - especially since some of them turn into robotic dinosaurs themselves.
The barbarians, who came through the first time-warp riding mammoths, were armed with iron clubs. It could not happen because Iron Age started many years after mammoths had gone extinct.