BIAB 2012 349, latest. Windows 7.

To end song, near the end of the 2nd chorus I put in a slower tempo for that bar, and checked 2nd chorus only. However, it slowed down there in the 1st chorus, making the whole rest of the song slower.

I checked bar settings again for that measure in which I changed the tempo. Now it says "All Choruses". I change it back to 2nd chorus only, click OK, then click bar settings again, and it has changed again to All choruses.

Is this a known bug? Is it impossible to change the tempo only on a specific chorus?

Is there anything I can do to make it work right?