Allow items at all locations is not turned on.

I am using Edit Items with the I/C module. I am entering Reorder data only for Locations that are Active for the Item we select.

For example, I select Location=48 (one of the Locations) for Item 1234, and record the first row of Reorder information starting 1/1/2011. When I complete the entry, I click OK.
Following this, I reopen the screen for the same Item, select the Location code=48, and the values are all 0, instead of the values that I entered!

And no - I cannot replicate the same issue on Sample Data. Even if I turn Allow Items at all locations off.

Here is one difference that I notice between Sample Data and my data:
- When I click on the Reoder tab on Edit Items, Sample Data automatically displays a Location (in this case, "BC").
- When I click on the Reorder tab on our data, the Location field is blank.