The Grade Chart sequence was changed after release of the issue about "Dianetic Clear is Clear". Prior to the change one could attest to Dianetic Clear as if it was a different State to a Clearing Course Clear.
Changing the sequence of Bridge actions was the only way continue to get people to do the Grades in light of the Non-Interference Zone datum and "Once you're Clear your next step is... etc".
By altering it the CofS continued to have a Bridge. All of which is kinda amusing.
That old grade chart doesn't say "Dianetic Clear". It says "Dianetic case completion". However DMSMH does talk about "clear" as a result of Dianetic auditing.
This is really interesting because this means that SCN could not admit (even in SCN tech) that Hubbard's assertion about Dianetic Clear was not entirely correct? So instead of correcting Hubbard's old stuff, thus saying that he made a mistake about "clear", they changed the grade chart instead? I am laughing and shaking my head.
A link to further corroboration on this item would be nice!