the reason spending any amount under $1 does not count towards min spend/qualified purchases (in this case) is cause Barclay's waives such trivial amounts at statement close. so in their eyes you did not spend anything and do not owe the bank anything at the end of the month. so if your statement closes with a $0 balance or $89 just with the AF, then you did not meet the requirement of making a purchase during that 1st statement -- and thus no bonus miles will post.

more info: http://www.doctorofcredit.com/small-...nt-amazon-gcs/