Found The Problem

If you process an Expense, Bill, and enter a invoice date that is anything but the current date it keeps that date system wide.

So when you go to do an Invoice the invoice date has changed from current to the date you used when entering the Bill invoice date.

Logging Off won't fix it

Shutting down PC wont fix it

Clearing Cache works as you suggested

May I suggest this is a BUG, at the very least changing from Sales to Expenses it should default to current date not some date used somewhere else within QBO

Regards Linden