No, his promotion date to LCDR was as noted. I believe you are confusing the date the citation was forwarded in 1945 with a date when awarded at some point after he was promoted to LCDR. In general, once a LCDR, even USNR, the date of his promotion would not have changed with his augmentation. Valencia was augmented into the USN from the USNR on 11 July 1947 . . . he had already been a LCDR for a year. And, indeed, you, yourself, have an August 1945 publication noting him as a LT.
Many thanks, that clears it up. I am not ashamed to admit my ignorance of the USN/USMC and more than grateful to be corrected
regards
Keith