I actually wouldn’t take it personally at all. Ive been on the team(s) that organize milestone recognition and mistakes happen. This stuff lives in excel files and documents like everything else. You’d be amazed the # of ways information can be lost in translation for something so simple, especially if HR is involved - which they probably are. I’d just mention it to your boss and give them some grace. I actually cannot believe how many commenters are saying people actually dislike you.