Questions... always with the questions...

And further...

How come Vader (at the beginning of... Star Wars - the first & fourth one) doesn't even recognise the planet he was born & raised on? And his uncle (or step-father, or brother-in-law, or whatever) Owen, who brought up Luke?

Is it at this point I should just be suspending disbelief? (Breathe in & out, it never actually happened.... it's not true). it's just one of those accepted symptoms of unexpected success & sequelitis...