Quick maths here: The first vote: 7.78 x 1.26 (price of sbd) = 9.8 $ (that's what I paid). I received an upvote of 9.725. 9.725 - 9.8 = - 0.075
The second vote: 1.574 x 1.26 = 1.98 (That's what I paid) and 1.952 (That's what I received). 1.952 - 1.98 = -0.028.

It's not 1%, but it's negative