Data Import in CRM 2013 - total records processed not equal to Successfully imported + partially Imported + Error

Hi ,

         I'm importing a txt file with around 15000 records in CRM 2013. The import completes successfully but the count displayed under Successfully imported in Data Imports tab is not equal to its records processed . Around 26 records less than the total records. But when the import file is validated against the data imported thru the back-end DB, all records in the import file are available in CRM DB. 

        The missing count is not consistent either. In the last iteration it was a different import file and the difference in count was 18.

Has anybody faced a similar issue?

Thanks in advance :)