You are in good company in your assertion.
From Appraising Residential Properties, 4th ed, AI (my bold for emphasis):
The smaller question in this thread is if the original appraisal under review adequately supported its market condition adjustments? The OP says that isn't the case. He or s/he has the data, so I'll give him or her the benefit of the doubt.
The larger question, however, is much more important:
This statement is clearly and patently incorrect. Not only do the fundamental principles of appraisal methodology not support it, they refute it.
It is bad enough if an individual appraiser believes that market condition adjustments apply to all comparables except the most recent one. The damage done in that case is limited to the appraiser's work.
However, if a reviewer believes this, then that damage is multiplied. It not only impacts his or her individual origination work, but now affects others' work.
In this case, the OP asserts that the report didn't adequately support its adjustment; as I said, I will give him/her the benefit of the doubt. But, from everything s/he has posted, it wouldn't matter how much support the report had or if the support was more than adequate, the OP dismisses the analysis out of hand because it isn't the way s/he would do it and that is that.
This isn't some box-checker working off-shore doing reviews. This is a licensed appraiser doing reviews.