We have the same problem University of Southern Denmark:
A reference like (Denison, 1990, p. 22) is when converting to unformatted citations equals to {Denison, 1990 #14@22}
However when I “Update citations & Bibliography” the page number is doubled: (Denison, 1990, p. 2222)
And switching back to “Unformatted citations” it is now {Denison, 1990 #14@2222}
I am using Endnote X9 & Word 2016.