In my opinion the McCann's lawyer was the one who misunderstood the archiving dispatch. According to the Supreme Court she failed to understand that it's contents were at variance with it's conclusions. She also thought it had more significance than it actually possessed.
from
http://pjga.blogspot.com/?m=01. The McCanns have invoked the principle of presumption of innocence to justify the restrictions they want imposed on dr. Amaral's freedom of expression;
2. The Supreme Court stated, in its ruling, that the above is no argument because the McCanns were not considered innocent by the investigation and the case was archived because not enough evidence was found to charge them.
3. The McCanns, because they believe the above argument is false, request for the Supreme Court's decision to be nullified.
so 1 says the mccanns invoked the presumption of innocence...and 2 ...the SC say they were not entitled to it because the archiving despatch did not clear them.......which is contrary to ECHR law as i understand.. This also confirms the mccanns were not claiming to have been proven innocent... They simply felt they were entitled to the presumption of innocence