Thank you for reporting this error with the time limits for the Shadowboxing speed runs to Crime City support. Our engineers have already taken steps to correct this time limit to the times specified. All players who completed the 48 and 96 hour speed runs within the time limit will be granted an additional Shadow Glove reward. This item has a stackable bonus of +3% Melee Attack.
Please accept our apologies for this frustration. Thank you for playing Crime City!