The ability to check one's ballot status implies that the ballot is tied to one's identity. How does the system guarantee vote secrecy?
Edit. From Wikipedia, https://en.wikipedia.org/wiki/Elections_in_Oregon#Balloting
Ballots packs are mailed to every registered voter 14 to 18 days before the election. When the ballot pack comes in the mail, it includes:
An official ballot
A secrecy envelope
A ballot return envelope
After filling out the ballot the voter then places the ballot in the secrecy envelope, then inside the return envelope and must then sign it in a space provided on the outside return envelope. This is then either mailed back through the US mail with first class postage, or dropped off at any County Elections Office or a designated dropsite. Ballots must be received in a County Elections Office or a designated dropsite by 8pm on Election Day (postmarks do not count). If the ballot arrives at the County Elections Office after 8pm on Election Day, it is not counted.
Once received, an Elections Official at the elections office where the ballot is received will compare the signature on the ballot return envelope to the signature on the voter registration card to verify that the voter is registered to vote. Once verified, the secrecy envelope containing the actual ballot is removed and polled with the other ballots. Once the "polls" close at 8pm on Election Day, the ballots are removed from their secrecy envelopes and counted.