R12.1.2 Implementing Oracle HCM in an existing Financial environment - need to create new Business G

A HR issue has popped up and I hope someone can provide some insights.

Scenario:  We have been on Oracle financials for 6 years using 1 business group with 5 legal entities (1 LE per country) currently on R12.1.2.  Now we are rolling out Oracle HCM and want to add 4 'new' Business Groups so the end result is 1 Business Group per country, with each employee assigned to the proper Business Group / Country.

Issue:  We when assigned an existing employee to the new Business Group we could not assign the Ledger and default expense account on the employee record.  The only solution we found on My Oracle Support was to create a new Responsibility with the Business Group profile option set to the new BG and then create a new LE & OU with a Ledger assigned.  This worked (i.e. we could assigned a default expense account to the employee record) however, now the employee is not able to perform iExpense, or purchase requisitions against the "old" BG, etc..