CONNECT - Not able to change attributes of nested references in Level Manager

I have just found out that I can't change a levels attributes of nested references using Level Manager. The sceenshot below shows them greyed out.

but in SS3 you can. See screenshot of the same file.

I assume that this is a bug and not WAD. Could we add this to the growing list of items that need to be resolved fro the first update, and which make using CONNECT painful?