Note that your combined click-through totals will appear in the campaign stats summary, on the Dashboard. To view combined click-through rates for all mailings of a campaign, click on Engaged in that summary.
To view click-through rates per URL, or for the latest mailing, click the Stats button underneath the campaign thumbnail.
Email Marketing takes you directly to the stats details for the most recent mailing of that campaign. Choose Engaged from the options on the left.