Apparently some people are really involved in a certain site. I noticed this on Area51.
This can still be seen here.
For clarity, the problem is that the first icon is repeated
We just fixed a bug where in some cases, an extra row was added to our "associations" table when a user first associated with another account. The extra row was never updated, but it was never deleted either. For example, reemrevnivek's Electronics & Robotics reputation was 2621 when he first associated his ER and A51 accounts, but his reputation increased to 5210 since then.
The extra rows have been deleted. Hopefully (i.e. assuming this is the only bug causing the problem), no more "duplicated icons" will crop up in the future.