What I dont understand about what you said Locke is that you said after Ganondorf supposed killed Link, he took the ToC and ToW, completing the Triforce. If Ganon than had in his control the full triforce, how could he possibly be sealed away! He has the stinkin Triforce! A piece of the three Golden Goddesses power! How could he just be sealed away by a couple of old men?!?! He simply doesnt make any sense.
My interpuration of the Triforce was always that it granted its holder ultimate power, and combined with the power Ganondorf already had, it doesnt make sense to me that seven old guys from down the street could seal him away!
From what I now understand after Ganon defeats Link, he obtains the ToC and ToW from Link and Zelda and with all three pieces he goes back to the Sacred Realm and then wishes that it be the Dark World which he then makes as his own domain and kingdom basically. When evil was coming out of the gate years later that's when the seal war happened and a new King of Hyrule then commanded the wise men to seal the gate, sealing Ganon there as well.