Well I went to install WAR just then so I could screenshot the effect to you, and the problems completely gone. It would disappear after creating a topic on the problem, sigh.
At the moment I don't have my full load order installed so it must be another mod further down the line causing the issue so I'll just have to keep my eyes open at what I'm installing and the effect.
To answer your question though it was forcing me into proper first person.
As for ARMA here are some screens showing the way it works.
Deafult
- Spoiler:
Default Zoomed - Hold Right Click
- Spoiler:
Iron Sights - Right Click
- Spoiler:
Iron Sights Zoom - Hold Right Click
- Spoiler:
Scoped - Control Right Click
- Spoiler:
To sum up, holding right mouse button zooms, clicking it switches to iron sights or red dot etc, and control right click switches between scope and sights.