Speed Disk made fragmentation worse; from 76% to 93% ?!?

I recently ran Speed Disk on all three of my drives.  C: (13.9 GB total, 883MB free) and D: (60.5 GB total, 33.4 GB free) are separate partitions on a single physical drive.  I: (189 GB total, 114 GB free) is a single partition on a 2nd physical drive.  D: and I: completed while running overnight, and resulted in 0.1% and 1.8%, respectively, fragmentation after optimization.  C:, however, started at 76% fragmentation, took TWO WEEKS to complete, and resulted in an even HIGHER 93.4% fragmentation ???   I ran all suggested “pre-optimization” steps on all the drives (ie. Disk Doctor, chkdsk, etc.).   Please Help!  Thank You