if your radio showed a deadkey of 1/4 watt on lsb,would you be overly concerned or just take a ocd pill and forget about it ?
If you're really, really anal about it, and it keeps you awake at night, and you're getting all neurotic about it... it's a real easy fix.
I don't know what rig it is, but they all have an SSB Carrier Balance pot on the board. While gazing lovingly at your watt meter, carefully adjust the pot for minimum carrier.
Dat's it, dat's awl, as my Quebecois friends like to say.