Thanks for your answer.
Up till now, the issue is only present with documents coming from Readdle, i have no similar experiences elsewhere. Actually this is what happens:
Being in Readdle documents i go to a folder in Readdle documents which is a folder synced with my dropbox > i open a document within dat folder > i go to the share button and choose "open with". > I choose
to open that document with Microsoft Word for Ipad (free version) > Microsoft word for Ipad opens it.> A dialog box appears wich says: read only document, click here to duplicate.
I could duplicate that document, edit it and save it again, but that leaves me with two of the same documents in my folder and i really would like to avoid that.
I could also avoid Readdle documents and open directly from Dropbox in word for Ipad. Then i don't get the read only status. But I like to work with the synced folder that is always available (also ofline) in Readlle documents
I also contacted Readdle but have no solution so far
Peter