Optimisation last scan report incorrect. NSBU.

All settings are enabled for disc optimisation & it runs fine but the last scan report shows incorrect details, last scan shows 5 days ago (when I reinstalled Norton) on the performance tab but under Graph 'page' it shows it has run 3 days ago & yesterday.

I uninstalled via the Norton removal tool.

Is the above a bug? Is anyone else having this problem?

Running Win 10 pro 64bit fully upto date. Norton also fully upto date.

Tia,