Problem with editing style citations to vancouver Superscript


I seem to have a problem with editing the style of my citations. I need the style of my citations to be vancouver superscript and I have edited the style to superscript. Previously this worked perfect. Today I started working on my paper again and when I wanted to insert a citation a different style appeared in my document. (see image)  I don’t know what to do to get the superscript style back.

Hopefully someone here knows what to do!

I don’t know what happened, but is is fixed!