CR1 immigrant visa processing time delayed?

Went for my interview on 23rd Aug 2016, interview went ok , questions asked and answered given.
Was given 221 (g) white slip to submit additional docs from husband, submitted on 29 Aug however status still shows as AP.

My interview was held in Singapore as I m a Singaporean. Called them on 6 Sept and was told please allow them to review for 10 days.

I’m worry as my husband had purchased a ticket for me to go back with him once his TSA corporate Inspection is done in Singapore which is 2 weeks away from now.

My question will be why is it taking so long for them to issue me a spousal visa despite providing them with all the REQUIRED documents?

No reason to cheat lie or anything to them…