Differences in Web & Eclipse - query parent + it's child

In the Eclipse client, I can form the following simple query to find a work item "x" and it's children:
OR Any can match
Id is x Parent > Id is x

- I can select "ID" as the first condition
- selecting "Show links" lets me see "Parent" as a condition, with sub-conditions including "ID" in the tree of conditions under "Parent"
- selecting "ID" under "Parent" as the second condition in the "OR" statement adds the condition "Parent > ID"
- the query finds the parent & 15 children as expected
- I can run this query from either the Eclipse or Web client and get the same, expected result - a list of work items including the parent and the 15 children of the parent

Problem:
- I cannot use the Web client to construct the query
- the second condition becomes "ID" not "Parent > ID"
OR Any can match
Id is x Id is x

Symptom:
- in the Web client, the Query Editor includes "add conditions"
- as above, I can see and select "ID" as the first condition
- I can see and select "ID" under the tree of conditions under "Parent"
- the result, though, is only "ID" is added to the query as the second condition
- the query only finds the parent and 0 children

Problem:
- I cannot use the Web client to modify the above query (created in the Eclipse client) - for example, to change the ID number to another specific number

Symptom:
- when I select "Edit" on the query created in the Web client, the second condition is no longer shown as "Parent>ID" but simply "ID" -
- running the unmodified query while in the Editor results in only the Parent being found

Environment:
I'm running Rational Team Concert, Version: 2.0.0.2, Build id: I20091211-0451