Afterburner Voltage Setting changes by one notch when I hit apply

Hi,

I'm trying to undervolt using Afterburner but when I select a setting (EG: -19mV), then hit apply, Afterburner seems to apply the settings one notch lower (EG: -12mV). This happens with every one of the 4 mining rigs I've built, so I'm thinking surely every person who uses Afterburner to undervolt has to deal with the same problem.

Anyone else notice this?
What are you doing to deal with it?

This "bug" (If that's what it is) prevents me from running afterburner as it is designed (with "apply overclocking at system startup" checked) because every time it applies the overclocking it will notch the voltage back up and after a few restarts the voltage will be right back where I started... with no undervolt.

My solution so far was to write a autohotkey script to detect the afterburner window and to send a keyboard shortcut to apply a saved profile (which is one "notch" higher than the one I want to run at). But that seems like a very "hacky" way of solving a problem that shouldn't exist. Surely other miners don't resort to strategies like this, especially when they want to run programs like CGWatcher.

What do you guys do? Or better yet, how do you prevent this problem in the first place?

BTW: I'm using the latest beta version and my cards are not voltage locked.