Identical children are created as separate terms

I am submitting this as a support request because I don't know if it is "by design", or if I am doing something wrong, or it is a bug.

Given the following two-level csv file segment:

Parent1, ChildA
Parent2, ChildA

Where ChildA has multiple parents (Parent1 & Parent2).

If I upload using the following options:

- Hierarchical structure or one term by line structure
and **either**
- Update (replace) existing term and items if exist else create
**or**
- Ignore existing term and create a new term

I get unique terms for Parent1 and Parent2 as expected, but I also get **two unique** ChildA terms, each with a different tid (unique "n" in taxonomy/term/n).

The result I want is that only **one** ChildA term is created, with both Parent1 & Parent2 as its parents.

If there a way to do this with current code, please tell me what the format of the lines in the csv file should be, and/or what the import options should be. Otherwise, please consider this as a "feature request" or a "bug report", depending on whether the current behavior is "by design" or not.

Thank you for the help. We have a csv file of hundreds of top-level terms and dozens of child terms - two levels only, but thousands of possible combinations - so this module will save us a lot of time if we can make it do what we want!