If you select pages for deleting, before you have made deletion of any page(s), then PDFmod will delete just them (=correct deletion), but PDFmod will display in its interface as remaining pages mixture of wrong pages and if you save this you will get the correct file.
If you select pages for deleting, before you have made deletion of any page(s), then PDFmod will delete just them (=correct deletion), but PDFmod will display in its interface as remaining pages mixture of wrong pages and if you save this you will get the correct file.