SE11 - Copy structure

I just noticed a small issue in SAP when I attempted to copy a structure in SE11.

I had create a custom structure called ZCUSTINVHDR. This structure contained 3 other structures (as appends). These were:

1. Customer address information

2. Customer header information

3. Customer line item information

As you will probably be aware points 1 and 2 are going to be flat (i.e. they are not line items). However I had them as append structures because I like to think and work in OO as much as possible, even if aspects of SAP dont really lend themselves to it. Only point 3 is not flat.

As I had added in point 3 I realised that the name of the structure (ZCUSTINVHDR) was no longer appropriate as now the structure contained both header and line item information. Therefore I copied the structure (ZCUSTINVHDR) from SE11 by click the "Copy" button. The copy process allowed me to re-name the structure and then delete the original.

However, SAP did no copy the original structure. Instead it flattened out points 1 and 2 and only kept the point 3 as an append structure.

Is it just me, or is this not a copy? Why does SAP do that? Shouldn't SAP call the button "funny copy functionality button" or something?

Cheers,

Adam