[liladypokerpro]

In your hand summary, if you look closely you will see this:

MyNemesis: shows [As Kd 8h 4h] (HI: three of a kind, Aces)
Wibbley: shows [Ac 4s Qd Qc] (HI: three of a kind, Aces - lower kicker)


So, there is the reason why you did not split the pot.

PS > CONGRATS ON YOUR WIN!