Let's take it one step at a time. First, this: http://www.damiensymonds.net/color-space-settings-for-the-lightroom-user.html
Also, for later, this: http://www.damiensymonds.net/bridge-30-day-challenge
Ok, can you do me a favour?
When you select a raw file in Bridge, there are two ways to open it into ACR - one is Ctrl O (for "Open") and the other is Ctrl R (for "Raw").
Could you try both ways, and see if the problem exists both ways?