If a marketing effort is created using a a communication template that includes a source code layout, saving the source code layout in the marketing effort duplicates the user-defined source codes used in the layout.
Note: This only happens with user defined source code parts.
We are currently evaluating this issue for a fix in a future service pack.
Steps to Duplicate
1) Create a marketing effort using a communication template where a source code layout is included in the template. 2) On the marketing effort page, go to Effort Settings > Source Code > Edit > Save without making any changes. 3) Notice that the user defined source code parts get duplicated.