audio out of synch in CS6 for iPhone 1920 x 1080?

When I play a clip, even before adding it to a sequence, the audio finishes before the video finishes, and the synch is way out of line by several seconds at the end of the 46 second clip.

FiLMiC Pro was used to record it.

In VLC, it plays perfectly, but strangely shows the frame rate as 23.365755.

Codec is H.264 - MPEG-4 AVC (part 10) (avc1)

1920 x 1080

Audio is MPEG AAC Audio (mp4a)  - sample rate 48000hz

I've tried creating a sequence from the clip (by drag/dropping) and the sequence that Prmiere creates says a frame rate of 24p.

What can I do to resolve this, I need to use these tesitimonials and can't really re-shoot them.

Thanks!