15 years? Where does that number come from? Sara and Ralph's flight was so short I thought all the time they had landed on a planet in the same system! In fact, it never even occured to me there could have been any significant amount of relativistic time difference generated.

Even more so because those people arrived when Sara and Emily had apparently barely left the mecha behind. I believed they had fired their engines the very moment they got them back online, and followed Sara to the planet she had landed on. And if they really had left the system, I doubt they would have so conviniently found a planet with entangled mechas with little steering abilities (as was made apparent by their less than stylish landing).

Now, I have no idea about quantum physics, but if they were in sub-light speed for a minute or two, surely you can't already observe 15 years of difference?

Well, after all these more or less uneducated points, I reassured myself again there certainly was no 15 years there.