OK, so I deleted all the backup jobs and reinstalled and THE SAME EXACT PROBLEM STILL EXISTS. I did this twice with a complete shutdown and restart of my computer between installations.
Then I reinstalled Version 4.8 Build 278 (4.8.278) and lo and behold the problem DOES NOT OCCUR. Do you not have a 32-bit machine available to test this? It would take all of 5 minutes for you to confirm what I am telling you.