You might want to check out the merger between the two companies, BOA and Merrill Lynch are now the same company for IRA's and Retirement accounts so they might be also merging for credit accounts also.
Started at 586 EQ and 604 TU in 8/2009
565 EQ Oct 09
614 EQ Dec 09
624 EQ Feb 10 ---604 TU Jan 10
643 EQ March 10 --from lender
Current 573 TU (myfico) 632 EQ (from lender) Jan 11