Tempo Adjust using minus key bug

[Biver]

When I try to adjust the tempo using the minus key (two over from the delete key on the macbook air keyboard) it slows the tempo by 1bpm while simultaneously moving to a different song in the main list, playlist or search result. The plus/equal sign key works as expected. It seems to go to 7 songs out of my 2208 songs alphabetically and then start over from the top (it loops around the alphabet) and then continues to the same songs again, once for each press of the minus key.

Weird, huh?

Version 6.1 (8200)
Mac OS X 10.10.2
MacBook Air (13-inch, Early 2015)
2.2 GHz Intel Core i7
8 GB 1600 MHz DDR3
Intel HD Graphics 6000 1536 MB