custom armor arms not corect place and random texrures that doesnt belong there

hello i made a custom armor set

when i equip it the arms are not on the player arms

the head hase some texture that i didnt put there

this is how it looks in blockbench

https://imgur.com/a/k2vuSNl

and this is how it looks ingame

https://imgur.com/a/as8GGHS