[xmgx]

At the moment I Have a workaround (on linux - should be similiar on windows) by setting the View-Database back to "sort by Date" every time before starting xbmc.
You have to install sqlite3 before.
My View Database where Info about sorting-order in Recordings View is in
~/.xbmc/userdata/Database/ViewModes6.db
in table "view" in column "sortMethod"

output of database content can be shown by:

sqlite3 ~/.xbmc/userdata/Database/ViewModes6.db "select * from view";

output shows then for me:
1|10697|pvr://recordings/|0|1|1|1|skin.confluence

Teh second "1" is the sort order and means SortbyName.
This has to be set to "2" by (and setting also sortOrder to descending)

#write sortmethod "2" sortbyDate
sqlite3 ~/.xbmc/userdata/Database/ViewModes6.db "update view set sortMethod = 2 where window = '10697'";
sqlite3 ~/.xbmc/userdata/Database/ViewModes6.db "update view set sortOrder = 1 where window = '10697'";

I put these two lines in a wrapper-script to set back the database and then launch xbmc also from the script.

So I always have SortbyDate at begin at least.
These 2 commands can also be executed while running xbmc (when You are not in the recordings-windows) to set back to SortbyDate