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Why is this happening?

There is a problem with the data comming from the Steem nodes.
The bot receives data about the same transactions multiple times. What is worse - these repeating data comes with different timestamps, so the bot can not destinguish between 2 transfers that are similar and 1 transfer repeated 2 times.
A fix is on the way.
Please don't be angry about the bot's mishaps in the meantime.