Hi, I may be asking some very dumb question but I'm really confused.

I have a onenote note book, when I check its properties, it shows its location in my Sky Drive -> Documents.

However, when I open up my sky drive app on my start screen, Sky Drive says there was no file in Documents folder. All ther files are visible to the app though.

When I open up my file explorer on my computer and access my Sky Drive, the onenote note book shows up as a weblink in the document folder, and the size is around 1 KB.  But when I go online and open up Sky Drive ->Document in a web browser, I can see the file and the space (50 MB) has already been taken up by the note book. 

The notebook is synchronizing all the time and I have no problem using it.

So my question is, why is the notebook invisible in my Sky Drive App on start screen? Why does the file shows as a web link in my file explorer yet it has already taken up space in Sky Drive?