It's odd that Ta is aware of the concept of swinging on a rope without the Marshalls demonstrating, as well as seeming to understand English.
In Circle (1974), one of the main points was that the Marshalls' appearance in the Land of the Lost had been the result of a glitch in the time doorway system. As they hadn't entered properly, the glitch needed to be corrected in order for Enik to return to his own time. Yet Enik is still in the Land of the Lost in season two.