DLC Sharing if the borrower owns the base game

[Zedseayou]

My brother and I both own Civ V. He owns the Brave New World DLC, whereas I don't. When he shares his library onto my computer, I do not see the DLC as available in the "view DLC menu" of CIv V - in fact his game library is not visible in my Steam at all because he doesn't own any base games that I don't own. Why is it the case that if I didn't own the base game, I could play his copy as well as the DLC, but if I do own the base game, then I can't access his DLCs? This is punishing me for buying the game.

[al]

A guest will have access to the account holder’s DLC, but guests may not purchase DLC for a base game they don't own. Any player may purchase, trade, earn, or otherwise acquire in-game content while playing a game, but in-game items cannot be shared between accounts. These items remain the property of the account that purchased or acquired them, whether borrowing or lending the base game.

http://store.steampowered.com/sharing/

[AAAAAAAAAAAAAAAAAA]

^Unhelpful. The issue OP described is prevalent and appears to be a bug, though I doubt a fix will be coming any time soon (I'm certain that the current family sharing rules are already unpopular with publishers. Imagine more lax ones.)

[Zedseayou]

Originally posted by Alex_Lee:

A guest will have access to the account holder’s DLC, but guests may not purchase DLC for a base game they don't own. Any player may purchase, trade, earn, or otherwise acquire in-game content while playing a game, but in-game items cannot be shared between accounts. These items remain the property of the account that purchased or acquired them, whether borrowing or lending the base game.

http://store.steampowered.com/sharing/

This is from the FAQ, which states that I should be able to access the account holder's DLC. Which in this case I clearly can not.