Can't say I've heard of any horror stories from Nong Khai, it can't hurt to plan to spend a few days in Lao before returning because using back to back Visa exempt with extensions it's probably going to be demanded of you. Personally I'd take my bike, if you are denied at least you'll have your bike and you can also go to the consulate and get a real Visa if they demand that of you. Explain that you've been delayed if need be by weather. I definitely try and have the three proofs 20,000 baht or equivalent in cash, some accommodation booked, and a ticket out within the 60 days you'd be stamped in for. I'm assuming this is your final leg. Congrats on your journey and perseverance and stay safe out there, keep your eye on every vehicle around you. Good luck.
I'd ask for clarification from the consulate using photos of your passport name field and the >>>MRZ zone to avoid any miscommunication. Then I would follow their instructions and include their email reply in my document submission.
As long as the account and everything associated to it links back to your name and your phone number and your passport number I wouldn't do anything right now. hopefully your bank account wasn't opened up in Pattaya. I think the DTV reasoning is a bit of a red herring. What the bank really wants is to comply with KYC due diligence. Since it's only Bangkok Bank doing this it's an internal policy which sprouted up due to their lack of diligence. If you do happen to get called out, hopefully you can still show medical reasons.
wait in the 800 person queue at Chaeng Wattana to convert from visa exempt to Non O, then again 2 months later. Save 3 mature trees from becoming photocopy paper.