Yet again, "Oooerrr!". It's dinner time here Saab Dastard so I'll have to come back to it later, wine allowing, to think about that..... But thank you. The whole thing just seems to be so weird.
You suggested that the defrag was removing orphaned fragments (I think you meant) but the defrag process added 10Gb to the 20Gb which had already been added by Madame's interfering (!). Defraggler, on this occasion at least, hadn't removed anything. Indeed I think it odd that it should add or remove anything in any event. All should remain the same in terms of space used, surely?