Row Group Text Is Wrong In Matrix Report

I have a matrix report with 4 row groups. I am experiencing a bug with the text that is displayed in the second group.

When it changes group 1, the text for second group is alway wrong for the first row in the list. It always shows the text that was displayed for the first row of the previous group1.

Here is what it looks like. Has anyone else seen this? Please tell me there is a solution and that matrix reports aren't just broken ...

Revenue

Income Type 1

Income A
Income B
Income C
Income Type 2

Income A
Income B
Expenses

Income Type 1

Expense A
Expense B
Expense C
Expense Type 2

Expense A
Expense B
Expense C
Expense Type 3

Expense A
Expense B
Expense C