It says “re-invite” because we're acknowledging that the special rapporteur was already invited and was willing to come. Your comment about three hours is fine. I'm not really stuck on the amount of time.
I think the 14 days gives us until about, if I'm not mistaken, June 8 to June 12-ish, depending on.... Maybe the chair can clarify that. I think that gives us time to have him scheduled in.
That was the rationale. I hope that helps.