Hey Skepsis, I'm late to the party here. From the sound of things, I wouldn't be surprised if one congregation or the other drops the ball and your records fall into limbo.
When I switched to a foreign language congregation, my English congregation dutifully sent letter and records. The new congregation promptly lost all the paperwork. I should have taken that as my cue to leave, but that was a long time ago when I was still a believer and in Bethel at the time, unfortunately.
When I moved away for my fade, I left the records in the old congregation and didn't give a forwarding congregation. I only received one phone call from the old secretary, and let it go to voicemail. That's been 5 years now. So I didn't have much hassle from the congregation, and the old 'friends' from the congregation have disappeared from my life, although some are on the FaceBook account I rarely use. Family, really only my parents, are my only remaining link to anything JW.
Best wishes on your ex-JW journey!