Deleted concordance lines that come back?

[Jeff]

Hi all, 

 

Has anyone else encountered this in AntConc? I clean out the concordance results after a sort but then those lines come back when I do a new sort with that same set of results. Here is an illustration: 

I get 51 results for "English" but I want to get rid of these lines here that don't have to do with English as a language (see file 1).

Then after deleting these lines I have 44 results, which is what we would expect (see file 2).


Then when I re-sort I still have 44 results but the 7 lines that I deleted are back! (see file 3).

Do I have to re-search the whole corpus every time I want to re-sort the concordance results and then re-delete the irrelevant lines? 

Thanks a lot!
Jeff