A few suggestions:
1) Is there a control application for the remote, something that would allow you to change the sensitivity? I have the same PC, but haven't tried the remote. : )
2) You could try modifying your key repeat rate and/or delay?
3) Finally, you could try using the StreetDeck "Exponential" volume option. While I don't believe it is intended to resolve the issue you report, it may help. Do be aware that this setting will affect the way the increments in which the volume slider adjusts volume.