Losing instance limit value

Hi,

I'm setting an instance limit of 10 against the 'All Folders' folder in BOE XI 3.1 by checking the 'Delete excess instances when there are more than N instances of an object' checkbox and setting the field value to 10. I then press the 'Update' button.

If I then view a sub folder I can see that this setting has been inherited and that the sub folder will only permit 10 instances. If I select another sub folder I note that the setting has been lost. If I check back to the 'All Folders' folder I note that it no longer has the setting enabled.

Is this something that I'm doing wrong? Am I expecting inheritance when it doesn't exist at this level? Am I using the feature incorrectly?

Cheers,

Mike