Merge Data icon (Parameters/MergeBehavior/WhenMerging ?)


I have created a pipeline with two branches. Each branch reads and filters a part of a database. The two branches are supposed to merge the output data using a Merge Data component (icon). Unfortunately I always get one row more in each entry than what exists in the Database Also, I can't understand the values in the Parameters setting of When Merging for the Merge Data icon.

Thank you for your response.