Please find the attachment, where I have changed the values. Please check the hotfix which the above post mentions.
Yes, 8.6.1 has all kinds of issues with min/max. It's actually the DIALOG which is screwed up, the actual properties work OK, but you can't adjust them correctly from the dialog.
Look for the patch: 8.6.1f1 Patch
Thanks Norbert. I have downloaded and installed. Now its working.
Mallya you might have told about the hotfix first hand.
Anyway thanks for all your time & support.