Hi pepe jose,
"Not sure whats going on but I keep posting twice with one hit of the submit button".........
Some light reading..............
https://laptopjudge.com/laptop-keyboard ... ra-letters
"This might occur if any dirt is present inside the keycaps. The presence of dirt sometimes let them register two or more signals causing it to type twice or more though you have pressed the keys only once. Use keycap puller to remove the keys, blow air, make it clean, and then refix the keys."
Turn Keyboard upside down and and vacuum with a brush fitting........you may need another pair of hands for this procedure.
Have seem where you Post and type Submit and it appears to site there so you type on Submit again........just give it time for first keystroke to work.
Lets know how you get on .....but please Post on Computer Section
UNIX is basically a simple operating system, but you have to be a genius to understand the simplicity.