Is her maiden name and old address listed as a "current name" and "current address"? If so, you'd want it changed. If not, ignore it. My DW's old info still reports. My old info reports too and shows wrong addresses, name typos, etc. There's no harm with that if reporting.
Now if the current name and info reports incorrectly, it does so because the creditors that she does business with still report that monthly. Even if you changed it with the CRAs, a creditor will change it back when they report next. If there are creditors that report monthly and still send the bills to the old address or use her maiden name, then you'll need to change that first, otherwise you'll have to do it again and again.
If nothing is reporting monthly, and if reporting as current info, then the CRA is right. They'll add up to 15 more days to the dispute based on the Fair Credit Reporting Act. Now that doesn't mean it'll take the full 45 days. It'll likely take much less than that to complete both disputes (name and creditor info).
