Docx Problem cant open in Windows Phone

Hello, I have a lumia 1020 with windows phone and office.
And if I create or Edit a word document and saves in Libreoffice then I cant open it in my windows phone with office.
I have tried both doc and docx.(this is both calc and writer.)

Seems like Libreoffice makes the documents unreadable for windows phone office.

only way to get my document to open in my windows phone is to open it in microsoft webapp and save it again.

but directly I make a change and saves it in libreoffice, then I cant get it open. Im using skydrive to save my documents but same problem in dropbox.