WPML endless pages creation

I installed WPML and need to have 2 languages:
Italian – default language, and English

Activating only Italian it’s ok, i can translate strings, but when i active English to make pages and articles in this language, on every refresh of the Page section it creates automatically and endlessly a lot of pages, also if I delete them!

It makes copies of (only in English language):
– All matches
– Clan challenge
– Registration

I need to solve this problem urgently

Thank you, Lorenzo