You've got this absolutley right. In fact the church policy that attempts to explain this is "FOLLOW THE LIVING PROPHET". The argument is apparently God didn't foresee technicalities in his commandments to previous prophets, but don't worry, we have a "living prophet" who will sort things out. Also God's original plan which he revealed earlier has been thwarted by faithless members of the church, UNTIL EVEN THE WHOLE CHURCH IS UNDER CONDEMNATION !! (I have actually heard this preached from levels all the way to the top, from the pulpit)
Don't blame God and don't blame the prophet either when they are wrong, IT's YOUR FAULT, so you OWE US !!
Also, if things are going well, it is OUR fault, so YOU OWE us.
....And if things are good for us, but bad for you, God is punishing you so YOU OWE US !!
Psychologists call this a "double bind", or a cult of guilt.....Find a factual quote from Brigham Young or Joseph Smith, even by accident and they pull your temple recommend for associating with apostate groups. They will even do that to you if you watch South Park. (not kidding)
FIP Ping to #25