Hello Hemrik,

Thank you for contacting Infragistics Support.

I followed the steps you suggested and was unable to reproduce the behavior you're describing.  I have created an UltraGrid grouped in two levels. I have added a summary and have updated some cell values. By completing this all my summaries have changed both parent and child.

I have attached the sample project I used to test this.  Please test this project on your PC; whether or not it works correctly may help indicate the nature of this issue.

If the project does not work correctly, this indicates either an issue possibly specific to your environment, or a difference in the DLL versions we are using.  My test was performed using version 14.2.20142.2059 in Infragistics Controls 14 Volume 2. So could you please let me know the exact version of Infragistics components which you are using?

If the project does show the product feature working correctly, this indicates a possible issue in the code of your application.  It will help if you can provide a small, isolated sample application that demonstrates the behavior you are seeing.

Or, if this sample project is not an accurate demonstration of what you're trying to do, please feel free to modify it and send it back, or send a small sample project of your own if you have one.

Waiting for your feedback.