It's like this: Terran asked Kabrinskia traders to leave and stay out. But those pesky traders kept showing up. D'Haran traders were never told by anyone to leave or stay out of Kabrinskia.
Do you understand now? Or should I break out the crayons? 
Indeed. Had they been asked to, they'd have avoided Kabrinskia. There's really no need for them to pass through there, though a few of Allison's neighbors might be displeased by the lack of business opportunities. I'm pretty sure the realms we trade with enjoy the deals much more than we do. And it's not like suppliers are hard to come by, these days, we are really just trading for the sake of it mostly right now.
To this day, Allison has still not done a request for D'Haran traders to pull out, though, just a vague reference to them.
