CRM2011 - Problem with Option Set values not showing in the DB

Hi

We have CRM2011 on premise and we have an issue with an Option Set that has been in use since our go live 4 years ago.

Between our DEV, TEST, Pre-Prod and Production environments we have normally just added new values to option sets manually on each environment instead of creating a solution for a single option set change and moving it through the environments.  This has never been a problem for us as we always ensure that the names and values are exactly the same on each environment.

However we recently added a new value to an option set in all our environment, and we can see it using Advanced Find and we can enter data into CRM using the new value.  However when one of our reporting gurus goes to query the DB they can see the code against the entry in the DB but when they query the StringMap table for the description there is nothing there.  so it seems the value is there in the front end but doesn't exist in the String Maptable

Can anyone help with this - I would like to know why its happened and how we fix it please

Thanks

K