I'm pretty sure that none of the Launched X-Cars have 2 car trains. That said, there's only 3 of them, I believe. There's Formule X, which is such a small, compact layout that it doesn't look odd. There's the one being constructed at Knight Valley, but then it looks like its on a similar scale to FX. So that leaves this one. I always assumed that that's how the launched models were, and guessed that it was to do with it being easier to launch or something? In fact, after a quick look at a selection of LSM coasters turned up by an RCDB search, all the ones I clicked on had single car trains (and were from a range of manufacturers). Perhaps its just a feature of this type of ride?*
*I realise that someone's now going to find an exception. I'm by no means saying ALL LSM's have single cars, but it certainly seems that the majority do.
FFS! Ignore my whole post. Just realised that RCDB lists Freischütz as having 2 car trains. Eugh. FML.