Clicking the Information icon on the end of the line "Positive Feedback (last 12 months): 100%" shows that this is correct. Never forget it's a marketing line, to encourage you to buy, not to help you. Percentages ideally shouldn't be rounded to 100% at any time, but generally are; but ignoring all neutral feedback makes it even more meaningless.

  We calculated this positive feedback percentage using the total number of positive and negative ratings...
  Positive feedback: 189647
  Negative feedback: 9...
  189647 / ( 189647 + 9 ) = 100%