Opening rate and clicks in newsletter campaign

I have two problems with my newsletter campaign.

1. how do I see the opening rate?

When I look under Behavior > Pages and find the page with the title Email-opened, the numbers are very low

Under Campaigns the numbers are much higher (and seems more accurate)

This is an example of the code in the tracking pixel in one of our newsletters

  1. how do I see which links people click on from a specific newsletter campaign?
    If I try searching for the campaign name in Pages I don’t get any results. Here’s an example on a URL in a newsletter