Wrong overall point calculation

Issue Summary

Points are shown wrongly. Two examples,

1) I clicked on +1 on a story. Points show as +1. However, then click on -1 to change my vote. Now, the image shows blue arrow looking down. However, points still show 1. Refreshing the page does not solve it.
2) On the main screen there are trailers for two stories. I clicked on +1 to bot of them. Both show points as 1. Then clicked on -1 to the story at the bottom of the page. After this, both first story and last story shows point as -1. The first story should have 1 points.