Steam leaderboards bug

I’ve just implemented steam leaderboards using the shooter game code as my foundation.
The problem I have found is that the ue4 engine code is somehow modifying my high score, to make it even higher each time I submit my high score.

I have found the issue is probably the same as posted here:

About half way down one person says:

and provides a solution by editing engine files.

I don’t want to have to modify the engine code to get my leaderboards working. Is this a known issue? When will it be fixed?

Has no one else encountered this problem?

I’m also having this problem. Would be really nice if we had some more robust access to Steam Stats/Leaderboards.