Hello
thank you for your answer but i’m not thierry, i’m the intern! 🙂
In fact I’ve resolved the problem, the redirection was in the database but I couldn’t see it in the back-office (via the redirection plugin), so I changed it in the database.
Concerning the code showing, it was a side-effect from a wrong configuration in the SEO-meta-something plugin..
In case someone have these issues, I hope this may help them !
Thank you again for your answer Christine!
Cheers