Prograde/Retrograde marker changing over

[Dessloch]

I wanted to do a retrograde burn to return to Kerbin from high orbit, but when I started to burn at the apoapsis to retrograde direction my orbit started to raise, not descend. I checked visually, my rocket is facing to the prograde direction despite of I'm facing to retrograde according to my navball. I already encountered this problem couple of builds ago.

I'm using only a Navball texture replacer mod, can this cause the problem? I used the Enhanced Navball mod before 1.0

[Zhartek]

Is your command pod flipped over? Prograde/retrograde is relative to the command pod / probe core.

[Red Iron Crown]

The texture change shouldn't affect it, the markers for prograde/retrograde are not part of the texture.

I think Zhartek has the likeliest explanation, sounds like the command pod is reversed.