Checkboxes disappearing, Autofill field instead

I believe I found the answer to my own question, and hopefully this will bring some light to others when they experience this problem.

In notifications_team.module around line 172 the code reads:

    $acomplete = FALSE;
    if (count($users) > 20) {
      // have an autocomplete box and only have users on the checkboxes that are already subscribed
      $acomplete = TRUE;
      foreach($subscribers as $u) {
        $user_names[$u->uid] = $u->name;
      }
    }
....

I now see why the nifty checkboxes are disappearing; the module is designed to do so. This brings two issue to mind:

1) The module documentation should state that when there are more than 20 users, the checkboxes are converted into an autocomplete field, and
2) I was under the impression that one of the Team Notifications main selling points (for me) was the simplicity involved with visual selection of team members. It would be nice in the future to have a Team Notifications setting page where this number could be set by those with the appropriate privileges.