Yeah I follow you, I see that the data isn't getting there.
I will put more of the code from the wrapper.tpl at bottom here, so people can see what is supposed to happen.
First thing that isn't happening is that its not registering what word strings it should be getting, [[%discuss.stats]] should return a word or words. The second thing not appearing is the data itself.
For both of these, I wonder how you converted or integrated the wrapper.tpl file into your design? Did you just cut out the header into your original template? Do you have all the lines from the head area of the wrapper.tpl? Especially watch out for the LAB file and scripts...and this line seems super important:
<body id="forumbody-[[+controller.controller]]" class="forums[[+discuss.user.id:notempty=` a-loggedin`]]">
I have seen similar problems before, but I don't know precisely what causes it. Can you get the output on any page? Or do all your pages have the same problem?
Here is the data from the footer of wrapper.tpl:
<strong class="m-stats-title">[[%discuss.stats]]</strong>
</div>
<div class="f2-f3 m-stats">
<strong class="m-stats-title">Total:</strong>
<ul>
<li>[[%discuss.posts]]: <span>[[+totalPosts]]</span></li>
<li>[[%discuss.threads]]: <span>[[+totalTopics]]</span></li>
<li>[[%discuss.members]]: <span>[[+totalMembers]]</span></li>
</ul>
</div>
<div class="f4-f5 m-stats">
<strong class="m-stats-title">Online:</strong>
<ul>
<li>Visitors: <span>[[+totalVisitorsActive]]</span></li>
<li>Members: <span>[[+totalMembersActive]]</span></li>
</ul>
</div>
<div class="f6-f7 m-stats">
<strong class="m-stats-title">Today:</strong>
<ul>
<li>Visitors: <span>[[+activity.visitors]]</span></li>
<li>[[%discuss.threads]]: <span>[[+activity.topics]]</span></li>
<li>[[%discuss.replies]]: <span>[[+activity.replies]]</span></li>
</ul>
</div>
<div class="f8-f12 m-stats-live">
<div class="m-stats-group">
<strong class="m-stats-title">[[%discuss.users_active? &total=`[[+activeUsers.total]]`]]:</strong>
<span class="m-stats-single">[[+activeUsers.users]]</span>
</div>