Really? Here's what his orders said:
But you are to hold possession of the forts in this harbor, and if attacked you are to defend yourself to the last extremity. The smallness of your force will not permit you, perhaps, to occupy more than one of the three forts, but an attack on or attempt to take possession of either one of them will be regarded as an act of hostility, and you may then put your command into either of them which you may deem most proper, to increase its power of resistance. You are also authorized to take similar defensive steps whenever you have tangible evidence of a design to proceed to a hostile act.
Then, according to the records, since his actions were to be predicated on Confederate action, would you supply the date and time of the assault on Ft. Moultrie.
Now for the rest of the story (/Paul Harvey voice)...
Buell's verbal authorization was countermanded by Buchanan. When Buchanan learned of Buell's instructions to Anderson, he had Secretary Floyd send instructions that countered them. From "Don Carlos Buell: most promising of all," by Stephen Douglas Engle; see pages 61 and 62 [Link]:
"When Anderson received the Secretary's latest words of guidance, he became furious. Buell's message had allowed Anderson to decide for himself when and how to act. Now the Administration was drawing back."
If Anderson thought he already had approval from Buell to move to Sumter, he wouldn't have subsequently wired Washington on December 22 saying [Link, my emphasis below]:
I think that I could, however, were I to receive instructions so to do, throw my garrison into that work [Sumter], but I should have to sacrifice the greater of my stores as it is now too late to attempt their removal.
Anderson never received the instructions he asked for on December 22 to move his garrison.
Buchanan's reaction after leaning than Anderson had moved into Sumter was as follows [Sources: Klein, "Days of Defiance," page 170; Tilly, "Lincoln Takes Command," page 110; emphasis mine]:
"My God! Are calamities ... never to come singly! I call God to witness -- you gentlemen better than anybody else know that this is not only without but against my orders. It is against my policy."
PeaRidge, I think we went over all the above and more in the past with non-seq. non-seq's earth shaking ultimate argument back was, "Absolute nonsense."