You can receive notifications about negative and positive karma using PX-Z's bot, AltcoinsTalks Telegram Notifier.
Thanks for the mention, i never thought this thread exists. The thread was posted a month old, i should already made reply if this was posted on the telegram's bot thread since it's the main purpose why this thread was made of
Or if someone mention me earlier as i'm always online.
As for the OP, the bot only scrape data from user's profile on a certain number of minutes, i always change it depends on the forum's server status and behaviour. I always change it for 10 minutes to hours before the bot scrape again.
Say you already have 55 karma, but you just receive -karma, so you should have 54. But the bot never scrape your profile yet, but in a span of 10 minutes you receive 2 +karma from different users until then the bot scrape your profile, then the bot will only notify you that you have 56 total so a +2 karma is sent to notify you, disregarding the -karma notification.
This is the same explanation to those who received more than 2 +karma notification.
The bot doesn't work real-time notification, because it only scrape web page on N time. Real-time notification only works if admin and i worked together like having an API on the karma logs of the forum but in respect on other karma features of the forum this is only i can do.
Well, actually, this was already explained on that thread too how the bot works on karma notification.
As for the -karma thoughts and drama, i'm out of it. Reddit is the most good example of it that its good to have + and - karma buttons.