1. Under waiver review means that the candidate has been found to have a DQ condition and a review is underway to determine if it is waiverable/and or a waiver request has been submitted and is being reviewed.
2. Under review means just that - the file is being reviewed by DoDMERB to determine if the candidate is qualified or not.
Hope this helps. I'm sure Mr. Mullen will be along soon to provide a more detailed response.
My dd also found that her status changed from "under waiver review" to "under DoDMERB review" after she submitted AMI documents and while they were being processed/reviewed by DoDMERB. Then her status changed back to "under waiver review" before the waiver was granted.