May I know, If I make mistakes in the sunnat acts of my namaz, make my salat invalid ? For example, doing mistake in salwats or all the Allahu Akbar that are not wajib.
Also, when I am doing my wuzu, and my arms touch or touch something like, the door or my clothes, make it invalid?

1. Can you explain the errors more specifically?

2. You Wudhu is fine