Sort branches "by most interesting" only shows first page

When I look at a project's branches, the default sort order is "by most interesting". I assume that's some measure that calculates different types of activity on the branches and assigns a score to each branch, then sorts them by that score. However, it seems to be a filter as well as a sort order, because the total number of branches is dramatically reduced when I choose "by most interesting".

Steps to reproduce:
1. Visit the list of branches for a project. The default list is "Any active status" and "by most interesting". In this project, it lists
1 → 95 of 95 results.
https://code.launchpad.net/openobject-addons
2. Change the sort order to "by branch name". In this project, it now lists 1 → 100 of 3486 results.

Expected behaviour: The number of results should be the same, no matter how I sort them. For this project, there should be 3486 branches both times.

Actual behaviour: when sorting by most interesting, it only displays the first page of results, and isn't clear enough that there are more results or how to see them. The only hint is a sentence that says, "OpenERP Addons has 3486 active branches..." and doesn't tell me how to see those other branches.