Remix shortens my music rather than making it longer

[NYCat]

I have a 45sec piece of music and I'm trying to make it into 3min 50sec.  Every time I run remix I end up with a 10sec remix.  Does anyone know why that's happening?

[SteveG_AudioMasters_]

It should work fine, but with that sort of extension, you should expect some (okay, a lot) of repetition of any short phrases it finds - that would be typical behaviour. If I try and extend a 30" piece to 3'00" it looks like this:

If the analysis doesn't reveal anything that it thinks it can loop, I'm not sure what will happen, though. I suspect that the results at any given time are very content-dependent.