You have a Xeno tag, but its not showing as you havent encountered any yet I assume, hence they arent showing up on your rep list.
Take a covert drive around Liberty until you encounter one, then they should pop up on your list. At which point, you'll be able to use the /droprep command to get rid of the xeno tag.
Do as Clarkie says, I had a Corsair tag on my BAF once for some reason and couldnt see them on the repsheet, so I went and found one and the used /droprep, all was fine after this.
Bravery is being the only one who knows you're afraid. - David Hackworth (1930 - 2005)
Just use droprep.
You don't have to see it on your replist to be able to drop it.
Thinking logically, if you have to see it to drop it, you'd have to be able to see it to have it.
Given that this is not true, your dilemma is fixed.
Just use droprep until you can see the flashing on your repsheet, and it's on the rep you want it to be.