1.) "login_address_shipping_payment_confirm_coupon_cart_status_fields,end" ... That workflow default setting works fine and brings up the address. (What I was trying to do before was bypass the login since the client just wanted a quick check out process without having to force login/registration. But this isnt a big deal. If it has to go through login then that's fine. It was puzzling how Firefox accepts it without login but IE, like all things tempermental about that darn browser, is picky about it.)
However, I have noticed a new bug though. Once logged in, if I uncheck option in the Shipping Address ("Use the same address as for billing"), the "NEW" button does not show up and there is no way to add or edit a new shipping address information. Also, checking and unchecking the option does not even show a copy of the billing address on the Shipping Address side. No browser errors show up. It's just as if the option for the "Use the same address as for billing" just isn't doing anything. (I also tested this in Firefox and, as expected, it does work perfectly! Just IE being ever so picky.)
The good news is... the "NEW" button (including the delete and edit button) for the Billing address information shows up fine.
Just for reference, I'm testing it on IE version 8.0.7600.16385.
2.) It was the "System - Cache" plugin in Joomla that was causing IE to not purge the Cart. (Again, in Firefox this wasn't a problem at all.) Thanks for the help on this one!