7 Days To Die Dev Tracker

Actually there are multiple issues with the sound even on properly configured sound setups.
Sound is not impacted or occluded based on objects.
Sound over distance is randomly as loud or louder than nearby sounds.
Sounds randomly swap direction as one turns (example, a very slight turn will cause a sound that is currently playing in the left speaker to play on the right channel {same for front/back} and then swap back again with a further slight turn or reversal of that slight turn.

Even the developers have acknowledged the sound system needs work (once they stopped playing with the magic blips {funny I mentioned it months prior but I had been playing with No Enemy Map Icons for a while})

Here are some comments from the developers acknowledging the sound issues:
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open the console (~` by default)
type dm
press the g key to fly
space to go up
c to go down

Don't die.

The 2 pack problems are STEAM issues.
1). When you buy a multi-pack, the first one is assigned to your account automatically (you and the developer/publisher have no choice), and the extra copies are given in your inventory as gifts.
2). Once you own a game, Steam prevents buying a multi-pack.

Both of these are STEAM problems that Valve has done nothing about forever.