Signature Count Dropping - Checking Into It

UPDATED BELOW --------------------------------------------- It has been brought to my attention that late last night, the signature count started going backwards. From the time the first screen capture was taken (by a supporter) until now, some 6 hours later (different time zones), more than 2,000 signatures have disappeared. I have signed petitions here in the past, and I am not aware of a way to un-sign one once it has been signed. I have reached out to Change.org to find out why this might be happening. -Matt ---------------------------------- I got a response from the folks at Change.org regarding the signature count dropping. Also, please note that prior to this reply, I got a message from a friend of mine who runs a very successful news aggregation website who told me the cause was essentially the same exact thing. The following is the text of the email: "Hi again, Matt: I wanted to follow up with you again today and say that I heard from our folks that the signature difference came from two sources: the removal of fraudulent signatures, as I mentioned earlier, and/or signatures being removed automatically due to invalid addresses. Apologies for any alarm or confusion this has caused. Let me know if you have other questions!"