Something funny is going on with the Playstation end. What I've noticed it that I'll sync my trophy data with the main servers but it will not update my 'score' when comparing trophies with a friend for example straight away.

So my trophy score for Uncharted say was showing as 70% on my trophy data under the Game heading on the XMB, but still showing as 45% when comparing trophies under Friends.

Upshot = delay at Sony end.