You can only use one method, local interface or OBiTalk to configure your OBi.
If you use the local interface to configure your OBi you must disable OBiTalk auto provisioning, otherwise OBiTalk will overlay any changes you make.
System Management -> Auto Provisioning
Under OBiTalk Provisioning
Method: Disabled
If you are using OBiTalk to configure your OBi, is there a red ! next to the value?
If there is then uncheck both boxes next to the value to see the real value.
The red ! means the value is not the default.