dynamic radiobuttonlist needs 2 postbacks to update selectedindex

[mcheng2]

Dynamically added RadioButtonList with AutoPostBack = true. On the
first postback, SelectedIndex is not updated.

For example:
SelectedIndex starts at -1.
Click Radio #1, SelectedIndex = -1.
Click Radio #2, SelectedIndex = 0.
Refresh page, SelectedIndex = 1.

I've set the ID of the dynamic RadioButtonList control. Any ideas?

Thanks!