Image assist multiple quirks?

Morning all,

Just been creating a new Win 10 Pro (21H1) image and have notice a few things that seem to be different from the last time created an image.  Using the latest version of IA.

- As part of out build we have renamed the built in administrator account. Now while IA has captured this and displays the amended name in Local Users and Groups > Users, when you come to log on to the device for the first time (pre joining the domain) it still displays administrator as the user and creates the profile as administrator.  Any idea why? 

- We instruct IA to use the admin account as the default profile which it does but now i see a brief Dell IA pop up window saying its applying the settings,  is this a new thing as I've not seen this before?