In your reputation tab you will only see positive evens, when you get points for your content.
If someone decides later different then you can't see it directly. Open the Expertise section when you are in your content tab. Then click the gear (at the bottom on the right - it only appears if you move the mouse over) of the card for SAP Business by Design. You can see that someone hat rated and liked a document, but then decided different and removed the like (2) and gave a new rating 3star or below which removed the 5 points for the earlier 5star rating.
