Post being published twice

The issue related to scheduled posts had been fixed long back.
But the fix was not compatible with certain wp installations

So we had to rewrite the solution.
In the new version settings page you have a configuration ‘Enable “future_to_publish” hook’

For normal working of scheduled post it must be set to “yes”
If you are experiencing double posting after turning it on, then make it “no”
Either one of these should solve all your problems