Originally posted by Blooz
The stats page displays all your kills.
The score page only shows the kills you get points for.
That is correct. The usual reason for a discrepancy between the two is; kills on vehicles while in fighter mode (ground kills dont count). And kills from gunner positions (which isnt scored for ranking purposes).
Proxie kills do generally count as far as kills per death, and kills per sortie, but you don't get perk points, and you dont get points vs enemy because you didnt score any damage on a proxie kill. In other words, if you were in a fighter, and got a proxie on another plane, that kill will show in both stats, and in scores.