Damage glitched?

I had experienced the damage number displayed is a lot greater than the mobs total HP but they won't die (about 15-20% of the time). Also experienced with the damage number less than the mobs total HP, but then it dies(about 5-10% of the time), so its not a lagging issue. Not sure if anyone else had the same experience?

always happens and is pretty normal. nothing to worry about. It's been around for a LONG time. Hell archers have had this happen to them since they got crit.

Yeah, it's glitched.

Sometimes I even ''MISS'' on weaker mobs and they die. (I use Rolling Spin which explains the MISS) Or I can hit like 10x the monster's HP and it's still alive. Maybe there are so many exploits in Maple that the monsters want to take advantage of as well. Cursed things and their godmode.

I believe this is just your client's RNG and the server's getting out of sync.
I've had several times where every time I saw a 1hko from my ring on my screen, the NEXT attack (or the one after on occasion) would kill anything (this was on my (former) hermit so I could tell the order in which monsters were being hit)