Problems when changing a Data Type in NWDS

Hi,

I am trying to maintain a Data Type in the Enterprise Service Repository in NWDS. I am finding that it is impossible to insert a new element between two existing elements. For example say data type is as follows:

Node1

     Element1

     Element3

If I try to insert Element2 between Element1 and Element3 I get the following:

Node1

     Element1

          Element2

     Element3

So Element2 is inserted as a child of Element1, and Element1 is changed to a complex type!!!! Is this a bug or feature? If the data type editor is so poor how is one expected to maintain a large data type? by going into the swing client?

What is going on? The editor also does not allow you to drag and drop an existing element to a new position in the data type.

Thanks

Che