It sounds like you haven't even interviewed for the K position yet. Is that right? That said, I agree with swansong. I'd take the 6th position, given the timeline, the uncertainty, and the fact that you wouldn't be miserable in it. I've known too many people who were sure they were a shoo-in only to be disappointed when there were others who were also shoo-ins who beat them out. It happened in my district this past spring. There were at least three people out of five being interviewed who thought they were shoo-ins for two open positions. There were at least two others who were upset because they expected to be offered an interview at minimum and weren't. In the end, one of the shoo-ins and someone from the outside were offered the two positions. It just seems too risky for something that you aren't sure of when you have an acceptable, albeit not perfect, alternative.