Footnote: Superscript Number is not Applied to All Footnotes

Currently, I’m using Libreoffice 4.4.1. My operating system is Ubuntu 14.04. On Writer, I tried to set all my footnote numbers to superscript. This what I did: F11–Footnote–Modify–Position–superscript. The problem is not all the numbers are superscripted, some are still in normal format. As an information, I created my footnotes by using Zotero. Can somebody show me the solution?

My attempt would be to select all footnote > right click > clear direct formatting.
If this does not work I am afraid you found a bug. May I then propose to file a bug report here:
Please note that for selecting the LibO version you need to scroll the Version list up

I think, I did a mistake earlier. By doing F11–character styles–footnote characters–modify–position–superscript, I have all my numbers are superscripted.