"You take #" is the total amount of damage you took that round. "(# absorbed)" is the amount of damage you resisted that round, which is already included in the total. So, when you see a negative number in the parenthesis, it means your Damage Resistance was overcome and you took additional damage that round (still included in the total).
So is this spose to happen? It's rare in interlock, but in free fire there's almost always a 2 or 1 point difference between the system chat and what is stated on the character. Your first free-fire is generally good with the damage dealt, it's the second one and so on.
My special Machingun Fist Combo delivers 469 damage yet in system chat I deal 488 damage.

When I finished this NPC off in interlock, the damage dealt in system chat reads zero.

My standard power attack during this volley in interlock was 19 points off the system chat.

The system chat read 2 dmg points above the actual dmg dealt during free fire.

The NPC subtracts 2 dmg points from my total in system chat during free-fire.

I receive no damage, yet the text for damage dealt by NPC is in red during interlock.

oops... I think I get the last one. I absorbed all his 82hp in his attack.... cool. 8]