Question about Deep Wound

i want to ask sth about deep wound,

e.g.
Y has 500hp and now he suffer deep wound (17 sec), --> 400hp

case 1
17 sec later, he recovered, so now he has 500hp or 400hp ?

case 2
5 sec later, he is hit by eviscerate(17 sec deep wound ), so now he suffer 17-5+17 sec deep wound or 17 sec ?

Case 1
he would have a max of 500, he wouldn't necessarily have 500 hp though

Case 2
Same conditions do not stack, so it would just reset the timer to 17 seconds