Creationists do not believe that the entire Bible is literal truth. Everyone knows that there are analogies, similes, metaphors and parables in the Bible. They do believe however that the creation story in the Bible is the literal truth.
In the quote you pulled from Joshua there is a point of view from which the sun was viewed, because men were there to witness it, thus the phenomenological language. But, in the creation story there is no witnesses, just God's word. Thus the creation story has no phenomenological language in it.
So how to they determine the truth from the analogies?