The episode numbers for Terra Nova do not line up with other metadata sources (e.g. tv.com, tvrage.com) in that the first two hour premiere is split into two episodes. Currently, Sidereel lists Instinct as episode 2, but others list it as episode 3.
According to FOX, the premiere episode is being listed as one, with Instinct as episode 2. So while we agree that it's annoying to see conflicting metadata, we're stickin' to the official source! Sorry for the confusion!
Terra Nova episode links are to the previous week's episodes. It is getting very difficult to find the correct episode when you have to trawl through scores of incorrect links. Some people have labelled their files incorrectly I think, which must have added to the problem. This has been going on for a number of weeks.