I had some text like this in one style, citing four references:
This is my text.(1-4)
When I switched to another style (American Journal of Physics), it changed to superscripts (correctly) and deleted two of my references from the bibliography:
This is my text.^1,2
Where I am using the ^ to indicate a superscript.
I tried to add back in one of the the missing references, and I got:
This is my text.^1,2,3 ^3
In other words, a second ^3 appeared although I had only dragged in the reference once. When I tried to delete the second ^3" Endnote deleted the first ^3 as well. In other words, Endnote will not let me put in just one copy of this reference; it must be zero or two. Can anyone suggest how to fix this?