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Hey @Jhillj66.
It sounds quite frustrating that even if you troubleshoot like that, it still won't sync. Having said that, let's try to setup the Alta once again to your account as if it was a new device. Sometime that helps out. Please follow these steps:
Let me know if you get any error message so that I can look into it.
Hope this helps you out! Feel free to reach out if you need anything else.
Best Answer