I am so used to crypticclues by now that you automatically read the instruction words as instruction words, but with these types of clues I love to allow myself the pleasure of literal interpretation for the sake of fun, and have to admit I just broke down at "I am briefly a cat".
Also, I feel that the most appropriate answer, both literal AND cryptic, to the clue about confused second digit is: "
Wot???"
I highly suspect that GROND is if not the answer to #1 then part of the answer, but no idea what the ewe has to do with it.