Hi Michael,
Thank you for using Syncfusion products.
I have created a sample with CheckBox in one column and bounded the same DataView to two GridDataBoundGrid controls. I can see the changes reflected in the second control while changing data in the first control. Could you please reproduce the issue in this sample, so that I could provide you the exact solution? Or please send us your sample with issue, we will analyze it and provide you the details.
Please refer the sample available in the link below and let me know if it helps:
http://websamples.syncfusion.com//samples/Grid.Windows/I71668/main.htm Regards,
Subhasheela R