Sprint issues completed

Hi
this formula is good.

For sprint issues not completed I use this formula:

[Measures].[Sprint issues at closing] -
[Measures].[Sprint issues completed]

this formula shows me “Issues completed outside of this sprint” and I don’t want them to show.
for example I have 27 issues not completed, but this formula show 35 issues not complete. those 4 issues completed outside of this sprint and 1 issue removed from sprint.
Why???