Communications Between Predecessor and Successor Auditors
For the purposes of this section, the term predecessor auditor refers to an auditor who (a) has reported on the most recent audited financial statements (fn 1) or was engaged to perform but did not complete an audit of the financial statements (fn) 2 and (b) has resigned, declined to stand for reappointment, or been notified that his or her services have been, or may be, terminated.
The term successor auditor refers to an auditor who is considering accepting an engagement to audit financial statements but has not communicated with the predecessor auditor as provided in paragraphs .07 through .10 and to an auditor who has accepted such an engagement. [As amended, effective for audits of financial statements for periods ending on or after June 30, 2001, by Statement on Auditing Standards No. 93.
If you think about it, the 8K was carefully worded to reflect the fact that all the work done by RRBB and ARYC was not a waste of over 2 1/2 years of time and expense on both sides.
That is no more than your own interpretation. What the 8-K said was that RRBB didn't do any audits. RRBB agreed to that statement.