Hi Todd,
Thanks for your interest in Syncfusion products.
I am afraid that I am not able to reproduce the issue of sorting arrows not visible in GridGrouping control when Autoformat is set to GridOffice2007. And you can also import images to indicate the sort arrows as mentioned in the code below:
$TableDescriptor SortDownImage="Images/hintarrowdown.gif" SortUpImage="Images/hintarrowup.gif"$
$/TableDescriptor$
Note: We have used ‘$’ instead of ‘<’.
Please refer the sample in the link below which illustrates the above:
http://www.syncfusion.com/support/user/uploads/GGC1_250add6e.zipPlease try running this and let me know if this helps.
Regards,
Janagan.