I think I read/heard somewhere that Shadow Empire wasn't really made to go to Steam at all. I believe Battlemode spoke about it on his channel some time ago or was it in Vic's blog? Can't remember.
So it is missing all the necessary infrastructure for Steam integration, such as overlay, play ...

Thanks Vic. Would it be possible to merge the values if they overlap, so only one net value is shown?

When you use that option, in this case Heart went down +4-6 = -2.

There are events where the same profile is shown to increase/decrease.
This example is from the Major Blackmail event, where Heart is shown to increase +4, and in the same sentence decrease -6.
There may be more.

Version number 1.31 H.

See the attached screenshot.