I chatted with one of the reps yesterday just asking general questions about reimbursement, acting inexperienced and confused. She said the policy has always been four weeks for reimbursement and that i should call/chat once that date passes if there are still problems.
One thing i am doing, is splitting my charges into smaller figures that match actual united fees, which should work until they start asking to see the receipts...and at that point bye bye Amex.