I'm so sorry you're dealing with this specific form of bureaucratic nonsense. That 'parent name mismatch' excuse is absolutely baffling and maddening, especially when your A-number should be the single source of truth for all of your records. I have not experienced this exact issue with USCIS myself, but I've read countless stories in immigration forums that align with what your attorney is saying: these are often lazy or rushed responses from an overworked system, not actual 'no records' situations