Hi,
Actually at DTP level, there is option to repeat process chain automatically. as my guess that might be selected. please check for the dtp which are added to your process chain.
You need to do in change mode. While adding link it should pop up will come with 3 options.
1. Success
2. Failure
3. Always
First try to see at dev system. once you got what you need, later apply same steps at prod.
Thanks