thunderbird layout question

[Bart Silverstrim]

Weird thing...one of my preferences changed, and I don't know how it was 
reset.

My folder list is reversed and I don't see the preference to alter it.

Instead of doing:
primary mail server
	folder 1
	folder 2
Secondary mail server
	folder 1
	folder 2

It now is:
Secondary mail server
	folder 2
	folder 1
Primary mail server
	folder 2
	folder 1

Where is the setting to put it back? Clicking the header of the columns 
doesn't re-sort, and it is displaying all folders, just not in the right 
order. View->sort seems only for message list displays.