Autocad changing dimstyle itself

[rob_deans]

Hi all, I am experiencing a problem where Autocad is changing my current dimension style to AM_ISO on its own, and I can't work out what I am doing that is triggering this action. 

I have set the style EDP 1.5MM seen below as current in my template, but when I create a new drawing AM_ISO is set as current. I then manually set EDP 1.5MM as current and a few minutes later ACADM has reverted back to AM_ISO as current. 

I'm having a hard time deleting the style, it's nested in a few other things and I figure its harmless as long as I can solve this issue i describe.

Any ideas?

[pendean · Accepted solution]

Dumb question, but did you go here to change your default? And checked that box too

https://help.autodesk.com/view/AMECH_PP/2023/ENU/?guid=GUID-EFEC462E-5433-4153-BE59-A304BE962ADD#:~:... 

[rob_deans]

If that was a dumb question what does it say about me that I hadn't done that? I was changing the settings in the actual drawing. 

Thanks @pendean , looks like it is no longer switching styles.