Where I have said such a thing? In fact, I have said EXACTLY the OPPOSITE.
Second, you do realize that you have to read a bit more than Art. 66 alone to fully understand the appellate rights of the convicted, right? There is the Manuel for Courts-Martial and decades of relevant case law to understand.
R.C.M. 910 might be instructive here, especially the part that says "which results in a finding of guilty waives any objection, whether or not previously raised, insofar as the objection relates to the factual issue of guilt". By entering a plea of guilty, the accused waives virtually all rights to appeal pretrial motions.
There are two ways to preserve such ruling for appeal. First, you may either plead "not-guilty", or you may enter what is known as as "conditional plea". Neither was done here.
You do realize that article 66 calls for an automatic appeal and review of all cases described within it’s parameters?
There is no need for conditional pleas.