achievement Behind Enemy Lines bug

hi i got a problem with "behind enemy lines"
i changed my GC today,won few frontlines with my new GC but the achievement wasnt counting my new wins,it says "combined" so it should count all wins .

Thread name: achievement Behind Enemy Lines bug
Time: 24 jan 2015,4 pm GMT+1
World name: Odin
Character name: kaori linchecn
In-game time: 2:00 pm

steps :
1. changed today my GC from maelstrom to immortal flames
2.won 2 fronlines matches,i saw that achievement doesnt count new wins only what i won with maelstrom
3. achievement says " combined" so it should count all my wins

pls fix this lot of people having trouble with it.

It most likely means combined between Slaughter and Secure.

nope i talked with a GM he said this was a bug and to contact here