here in mexico we have a different issue, because telephone operators add one digit to cellphone numbers. You dont seem to have this problem.

The fail-too-many displays when we run out of SMS monthly registration requests, this to prevent excesive SMS losses for whatsapp company, every SMS means money, and its more when it's international messaging.

I dont think clearing device helped you, instead I guess whatsapp team manually resetted your counter back to 5 or 8 whatever is the initial limit, after the 7 mails you sent them. And the clear device you did was just a coincidence. But just my thoughts, and Im sure tgalal is already aware of this, and realeasing the new version with internet confirmation-