I deleted the vmsd file and used the snapshot manager to make a new snapshot.
If that is literally all you did then you have an orphaned snapshot or several orphaned snapshots that you'll eventually have to deal with and you may want to clean it up now vs. later. If you do have any orphaned snapshots then delete the one you just took and it will consolidate the orphaned snapshots into the parent disk. Then take another Snapshot and the .vmsd file will now reflect the true start of the actual number of snapshot disks present in the VM! 