In patch 294 (the latest patch as of writing), a bug which caused the game to store saved character info in the incorrect location was fixed.
Because the location of where the game was storing this data was changed, the data was reset when this patch was applied.
This causes your pet list to reset to it's default order, destroying your manual sorts.
If you wish to restore your sorts to the way they were before this patch was applied, then this tutorial is for you.
1: Goto your
Users folder, and locate the folder which has a corrupted character. It should read like this: "
Documentscode.client.é¤irectory.cache".
2: Go into this folder, and copy all of the files inside.
3: Navigate to
My Documents/Mabinogi/Cache.
4: Paste the files you copied earlier into this folder.
This will fully restore your old pet order.
Enjoy not having to resort all of your pets.