Offset not working?

We have an allocation whose offset is not happening. We tried initially to offset it to a specific location in order to match the design needs. But we could not get that to work. When that failed, we left it at the default "Offset at source" — but as you can see below the offset did not happen.

What could cause this? The rule is completing successfully, and we are allocating dollars as expected — but the offset does not occur?