Comment 17 for bug 115153

Steps to reproduce:

- Pull down Thunderbird thread page column picker and choose "Order Received",
  so you can see
- Click the header of the thread column to sort by thread

Expected: Date column acquires "sort arrow"; Thunderbird sorts the threads in order of "earliest date in thread". After all, threading is an inherently date-based thing.

Actual: Order Received column acquires "sort arrow"; Thunderbird sorts the threads in order of "lowest order-received number in thread".

I don't know how the order received numbers are allocated, by as they are not congruent with date, you can get some very strange sort orders. Examples and screenshots available on request. This is particularly bad if you are the sort of person who triages their inbox into a "to do" folder, because the Order Received number gets reallocated whenever you move a message from one folder to another.

This may be a duplicate of or related to bug 57898, but I'd like a Thunderbird developer to comment on this particular common scenario.

Gerv