It is not a recommended practice for multiple PBLs in the same application containing DataWindows with the same name. When converting to the C# models, only the first DataWindow will be converted (the other duplicates will be ignored), because all converted C# models are placed in the same ASP.NET project, and a single ASP.NET project cannot have two models with the same name.
Please avoid having DataWindows with the same name in the application.