Game Mechanics: Teir'dal forge making Enchanted Adamantite Jointing

[Ashintar]

So very randomly and rarely the Teir'dal forge in Neriak C will give me back the file and Teir'Dal smithing hammer, but will reverse their icons and names when making the Enchanted Adamantite Jointing. The only way I know this is I'll put the jointing and the "hammer" back in the forge with all my other items only for it to tell me that those items cannot be combined. I have to exit out of the forge and close all of my bags, re-open, then find that the slot where I put the "hammer" now contains my file and vise versa.

This happened today around 5:20 mountain:
[Sun Jun 23 17:20:41 2013] You can no longer advance your skill from making this item.
[Sun Jun 23 17:20:41 2013] You have fashioned the items together to create something new!
[Sun Jun 23 17:21:02 2013] You cannot combine these items in this container type!