Traff.....interesting verb!!!!! Meet, crash into!!!
This is similar to the phrase 'bumped into' in English...
Why is ikke moved behind dem in this sentence?
It might put the emphasis of 'ikke' on 'hjemme' so "I met them, not at home (but somewhere else)." Just a guess.
Could it be: i met them not at home
That's a literal translation but unfortunately doesn't work in English :)