RobM - I looked at my notification feed and yours - they both look like they are in chronological order to me.
BUT...maybe that is because i'm in the TimeZone where the changes were made?
Can you either PM me (or paste here) a screencap of the order in which you see the notifications?
Further - you may be able to adjust timezones and display preferences for things in your
My Preferences > Settings (https://community.f5.com/t5/user/myprofilepage/tab/user-preferences)
You can optionally change your Date Display Format to include the timezone using this notation.
dd-MMM-yyyy | zzz
(there is a backend issue with reporting or else I'd have this set as the default for all)