I found this in relation to the "Thutmose, Amenhotep syndrome". Those that accept this theory, believe that the Pharaoh ruling from Memphis was a co-regent and named Thutmose, while the elder and senior Pharaoh was ruling from Thebes by the name of Amenhotep. They further believe that the junior Pharaoh Thutmose, upon succeeding to the senior postion changed his name to Amenhotep and moved to Thebes to rule. i hope i got that right?

Well, according to Joann Fletcher in her book, Chronicle of a Pharaoh, The Intimate Life of Amenhotep III pg.128 states.
"At the end of his third decade as king, Amenhotep moved his court permanently to Thebes, where he had built "the palace of the dazzling Aten." The palace stood on the Theban West Back below the western hills where the sun set each evening, and directly opposite the king's temple of Luzor. Amenhotep's move to Thebes was in direct contrast wtih the behaviour of previous pharaohs, who had based themselves at the traditional capital of Menphis and had only come south to Thebes for the annual religious festivals, setting up temporary court in palace building attached to Karnak temple."

Not only do folks that support this theory do not give solid evidence that the mothers listed as King's mothers are inncorrect. They provide no answer to my question about the tombs of the 18th dynasty Thutmoses and Amenhoteps in the King's Valley. Their theory of the importance of Memphis vs Thebes appears to be as poor as their other arguments. Umm i don't like to say it but it looks like this theory is no more valid than many others that attempt to rewrite Egyptian history. i am sorry.