Thank you for your reply Scott!
Ok understood, but:
1. Is there otherwise a way to just hide those sentences and just auto-return automatically ?
2. Or just remove the redirection ?
3. Another question about overriding of instructions. It seems there are 3 ways to set up redirection :
A- from paypal itself by setting up auto-return
B- from plugin in Contact > Paypal settings > Other Settings > Return URL
C- from plugin in Contact > Contact Forms > Edit (one of the forms) > Paypal > Return URL
Which setting overrides all ? I understand C overrides B, but does A override them both ?
Thanks in advance for your reply.