Last two updates result in duplicate posts

Hello,

recently I added the plugin and it worked just fine.
Now in the last days there were two updates which destroyed the automatism.

The first one just posted just “{content}” into each newly added blogpost. Then I restarted the running campaign and it resulted in duplicate blogposts.

I deleted all and thought it was just a one time issue. Then the next update came and the same thing happened.

Now I disabled the “Post Template” option in the campaign and thought that this would end the problem.
But today I saw again many duplicates of already added blogposts from earlier times.

How can I solve this?

Does this option in the settings help, cause its not recommended?
“Add an extra duplicate filter by source permalink in meta field value.”