another confused person here ...

I had the same problem when trying to install my Rival groupset. I always go through any instruction manual before installing just to make sure I am not missing anything. The manual (2009) that came with the groupset said: 2 spacers for a 68mm BB (which is BSA). Unfortunately the groupset did not contain any spacers whatsoever. I started to look for a new instruction manual on the sram site and found a revised version (2010). Suddenly the instruction manual only showed 1 spacer on the non-drive side only ?!

I decided to check with the European Sram branch here in the Netherlands where I live. The not-so-friendly dude there first told me off since I was not supposed to call them directly as being a consumer. After I put on my "hey I am someone that bought your ******** product you *sshole"-voice, he checked with a colleague and was able to tell me the spacers were only supposed to be used on an MTB.
Since he was not too keen about him giving me any info at first, I wasn't sure if I hould believe him.

To make a (already) long story short.. I have decided for myself to use NO spacers on the 68mm BSA BB and see what happens.