I was browsing through questions and all of a sudden my reputation on superuser dropped from 16 to 1, this I am sure of, and I can't seem to find a reason why.

On the other hand, I think my reputation on Stack Overflow has gone from 12 to 13, again with seemingly no reason.

Also while trying to post this I received the message "Your post cannot be submitted at this time due to the volume of spam and abuse originating from your network". I am on a work network where I am the IT admin and I am very sure I would be the only person using stack exchange. A few users accepted various correct answers i've given across the site in order to try and help me to be able to post this question to get help.

I know these aren't big numbers to begin with, but does anyone have any idea what caused this? Why does SE think i'm spamming? (Should I be worried about some sort of trojan or spambot in my network??)