Hi Russ,
I found the same thing when trying to change the System Culture (so that the date would display in en-US instead of en-GB). I noticed that it would sometimes revert back to the default/British date format.
What I found is that everytime you edit the configured app in ConfigurationCentre, it copies settings from the the ConfigurationData.xml file as a template and overwrites your tps.config (and any changes you've previously made). Here is what I did to fix this behaviour:
- Find/Open the ConfigurationData.xml file in the ServiceDesk.ConfigurationCentre folder on your web access server (e.g., "\ \LDSDWEB\ServiceDesk.ConfigurationCentre").
- Locate and update the Value for the settings of concern.
- Save the xml file.
I can't say for sure because I don't know the inner workings of ConfigCentre like a LDSD Tech would... but by experiment and empirical evidence, I would say this is probably the case for you as well.
-Brian