Hi 
Sorry about the last answer! I'm forwarding this question to the Documentation Team as they might have a better and quicker answer than the Users List. (If you are on the docs team then please just scroll right down to the question. If you don't have a quick answer then don't worry as the Docs List is not for answering questions like this unless helping someone new to writing official documentation)
I also don't have a good answer so i've tried to gather a few thoughts. The Writer Guide, Chapter 13 "Working with Master Documents", might be more helpful
http://wiki.documentfoundation.org/Documentation/Publications#LibreOffice_Writer_Guide
I suspect that when you open the master document it still asks if you want to update links? Even if not then it might be worth doing a deliberate and easily spotted edit to one of the documents and then reopen the master to see if the edit appears.
I think there are at least 2 ways of inserting documents into a master document. Is it DDE-links that operate the way required? The other way would be to insert as a section (i think) and it's possible that is what happened this time. I'm not sure how to recover from that. It might be best to do a new master but it might be possible to edit the xml file that is inside the Odt or DocX. The first time often takes ages but 2nd time is really fast because there are tons of decisions and trivial issues that you had to wasde through and research first time but 2nd time around you already know what you are aiming for. Could you let us know which format the master document is saved in? If you are using Windows then it probably hides the file-ending but if you hover the mouse over the documents icon then information about the file should pop-up in a yellow box. Can you see if it's Odt, Od(?), DocX or something else?
Forwarding a post back to the list or starting a new fresh email are good ways to start a new thread. Either way you need to copy&paste or re-type the Users List address into the "To" field.
On this list we should really be prepared to deal with cases where people are unfamiliar with mailing-lists and help them become familiar with things such as bottom-posting and other nuances that they may have never experienced in any other communication until now. That is, if LibreOffice is to be a gateway project welcoming people into OpenSource rather than remaining a tiny niche product almost unknown and unheard of out in real offices around the world. Just my opinion of course
Good luck and regards from
Tom