Confirmed all of your observations....which actually surprised me.

For the "Bundle Display Name"...it appears that "zman bc" uses the Bundle Name to populate that field, regardless of the value of the "Display Name".
One option would be to edit the XML to alter the Bundles Name, Import it, and then use ZMAN to rename the bundle.

No...Not Ideal....

FYI....
Bundle Export/Import via the ZCC seems to handle the Icon stuff correctly.
The Display Name is handle "Different" where that becomes the default Bundle Name...Not sure that is any more correct....but at least that is requires responding to prompts...