Because Shuffle has let you withdraw your funds on 3rd January while one of your previous withdrawal is pending for investigation.
That's strange to me as well. If the account of OP had violated or abused certain rules, his account would have been restricted from making any further withdrawal. But from the proof op had submitted here, it shows clearly that his withdrawal within the 29 and 30th was not approved but that of the 3rd was approved. I wonder why that's possible.. I will equally ask op if he did something he's not tell us about here that made that specific withdrawal to be under review.