Order of emails changes in Inbox

[brettania]

Question relates to Outlook in Office XP (all updates made thru to SP3).
Each morning I get a pile of new emails which are alerts for a forum I belong
to.
I have my Inbox set in ascending order and go to the first new email received,
open it, read and hit the delete button. That normally brings up the next
email to be received, but sometimes one or more are missed. The funny thing
is that they appear to "jump" in position, dropping below the one I have just
deleted.
This phenomenon is new, and I have made no changes AFAIK that could have
impacted on Outlook or Office.
My mail server is an IMAP one, but it has worked fine since I began using it -
- until this problem arose.
Any help/advice appreicated.

 

[brettania]

Just to clarify a couple of points

I have my Inbox set in ascending order and go to the first new email received,

.... that is the "oldest" of the new mail

open it, read and hit the delete button.

Should have said click on the delete button...

 

[brettania via OfficeKB.com]

I have just done the last set of updates and this problem is still there.
Help please!