Workshop Discrepancy in an answer vs. practice test

There was an answer in the Waterproofing Workshop yesterday that said the architect should check on the window manufacturer for window failure. An answer to one of the practice tests for CE is as follows: Question - After testing a particular window, a substantial amount of water is found on the inside window sill. Contractor: Given that this is a means and methods issue, the contractor will initially investigate the problem. Depending on what they find, others could get involved as well.