My bet is that you let excel guess at the range that should be filtered and it
guessed wrong.

Empty rows or empty columns can confuse excel.

Try removing the autofilter
Then select the entire range to filter
and reapply the filter

Then test once more.

Amanda wrote:

When I select '#NA', for example, in one of my columns, it only pulls the
#NA's up to the last row in the previous column and then leaves the rest of
its own column unfiltered.

--

Dave Peterson