Hello again April! Just to be on the safe side, we have submitted more than 6 documents as we only have 1 which was addressed to us as Mr. and Mrs. we have provided more than 6 documents for each of us from different sources and yes, in a span of 2 years, to be precise-documents that we received months after I received my spousal visa up to the most recent ones before we had the appointment. Hope this answer helps!