There is nothing "alleged" about Oswald's denial of the curtain rods. It is a matter of record for which there is zero evidence that anyone made this up. He denied it to more than one person. It is just CTer dishonesty to suggest that it might, maybe, possibly didn't happen because they don't like it. As for your "explanation" of his denial, it makes no sense. How exactly would Oswald think it improved his situation to deny that he carried a long package containing curtain rods when he would have known that he had driven to work with Frazier who had seen a long package in his possession? In your bizarre explanation, Oswald is denying that he has exculpatory evidence that he knew would assist his cause and that a witness (Frazier) could confirm! Instead he denies it. That is fall on the ground laughable. But then it gets even better. The super fantasy conspiracy swoops into action and recovers the curtain rods at the TSBD which they then successfully cover up. But ooops. Five months later they decide to bring them to light (and conveniently fill out a form!) to test them for - wait for it - Oswald's prints on items they would have known in this scenario that Oswald carried and that they would have every reason not to want to associate with him by, for example, testing them for his prints. Good grief. You can't possibly believe that nonsense in which everyone is acting against their own self interest.
Breaking News!!!Mr Richard Smith confirmed earlier today that he still cannot come up with an explanation for the clear, unambiguous hard evidence that
-----------as of 7:30 p. m., 23 March 1964------------
there were 2 curtain rods in the Paine garage; 2 curtain rods in Lieutenant Day's crime lab.
Sources close to Mr Smith indicate however that he remains "quietly but defiantly" committed to the view that
---------------15 March 1964 came after 23 March 1964
---------------23 March 1964 came after 24 March 1964.
"Smith is one of our top guys," commented one LN source understood to be particularly close to Mr Smith. "If he says 2 + 2 = 2, then heck, that's good enough for me."