It ran with 5 cars in Mexico but I believe the trains may be from Mindbender (GalaxyLand) which ran with 3. Both source rides had accidents due to poor maintenance so it may be an issue of just not having enough parts to build a full 5 car train but also could be in the interest of reducing forces. I don't know any of this for certain but just some somewhat-educated speculation. I think the biggest reason why it looks so weird is because the default image of those trains typically relates more to the park installations like SooperDooperLooper.