Running a table optimization only compacts the data in the table to make it more convenient (and thus faster) for MySQL to access. It won't actually fix any incorrect data.
The problem in that forum is certainly interesting. The right date range shows up if you choose something other than "show all", such as asking for topics from the past week.
Please
open a support ticket for this issue so that we can look at your board and database to try and determine the problem. Include the URL to this topic in the ticket body, as well as a request that the ticket be assigned to me. Thanks.
