You know, Universal could be doing what other TV related companies have done. Which is show a certian number of episodes first, then show the multi-part origin later in the series.
There are shows that have done this. One example is the 1989 cartoon, Chip 'n Dale Rescue Rangers. This show went through over 50 episodes before showing how the Rescue Rangers got together and what their first case was.
Another one was Freakazoid!, where they didn't show how the hero got his powers until the 6th episode.
Even multiple versions of Batman, Superman and Teenage Mutant Ninja Turtles have done something like this.
For all we know, Universal could be doing the same with LBT.
Anyways, further research has proven this episode to actually be the first to air on TV.
It seems that the first two eps consisted of the following plots: Ep. 1: Finding Chomper a new cave to live in. Ep. 2: A tooth related plot. (Maybe toothache?)
This info came from a TV Guide website. I'll get back to you later with the link.
