lenkact
hope you'll excuse my mickey taking
yep, it's probably the background checks that are holding things up, these things are very unpredictable, depends on the attitudes of the various countries that need to be contacted, plus of course if there's a "hit" then an evaluation has to be conducted
if you like I can refer you to an official document on what can happen if there is a possible case of inadmissibility resulting from a security check