First, I apologize for my bad English.
I said that I installed this plugin on a wordpress maintained and secure.
First, the functionality to tag old posts does not complete successfully (PHP errors) if not enough about certain words or phrases in the content.
Then I found that if this process (explained above) does not end there may be some items automatically post themselves: a sort of revision you do not decide.
Anyway, I can not find the cron (or whatever) to solve this problem.
I do not thank the developer who has not taken the time to properly test his plugin on different configurations before you make available to users.