I uploaded the attached excel workbook to the 2.6 demo site. I then perform the following actions:
1. Delete the sheet "EQ Detroit"
2. Starting from the right-most sheet (sheet 16) start deleting sheets one by one from right to left (Sheet 16, sheet 15, ...)
3. At Sheet 8, select delete and I get the following error: Sheet index (31) is out of range (0..30)