How did you connect the mesh to the bone armature?
Did you follow the GameDev Blender chapters on rigging?
If automatic weights are used and you are experimenting. It’s best to be sure that old weight painted maps are deleted before started a re-parenting.
Automatically means, Blender it’s best to do the job for you. But the outcome will not be 100% effective or logical. It depends also on how and where you place bones.
This means that the weight painted maps need to be manually adjusted for each bone, if needed.
im sorry for my lack of explanation. yeah im doing experiment on rigging right now, but it didn’t go well last time
I’ve tried your way, and yeah i’ve found a new way out. I’m trying to delete my Old Weight Paint in Edit Mode -> Block faces/vertices that i dont want to include in one of my bone -> Vertex Group -> remove. and then i assign faces/vertices that i want to include in my bone
And it works ! Now my bones are not messed up just like before
Thank you very much sir for your advice on deleting my old weight paint
I am happy to send you in the direction of a solution.
As a last note, automatic rigging is helpful but manual painting is unavoidable.
Also the way your mesh designed has influence in the process.