breadcrumbs aren't really a history of where you came from. Here is the markup in the breadcrumbs widget:
<ul class="nav nav-pills nav-sm">
<li><a ng-href="?id={{portal.homepage_dv}}">${Home}</a></li>
<li><i class="fa fa-chevron-right"></i></li>
<li ng-if="!c.breadcrumbs"><a href>{{page.title}}</a></li>
<li ng-repeat-start="item in c.breadcrumbs">
<a ng-href="{{item.url}}">{{item.label}}</a>
</li>
<li ng-if="!$last" ng-repeat-end>
<i class="fa fa-chevron-right"></i>
</li>
</ul>
so the page title always goes in the second place.
In the third place, you can inject what you want. Here is some example code from the client controller of the sc-cat-item widget that injects into the breadcrumbs.
if ($scope.data.sc_cat_item) {
var bc = [{label: $scope.page.title, url: '?id=' + $scope.data.sc_catalog_page}];
if ($scope.data.category)
bc[bc.length] = {label: $scope.data.category.name, url: $scope.data.category.url};
bc[bc.length] = {label: $scope.data.sc_cat_item.name, url: '#'};
$rootScope.$broadcast('sp.update.breadcrumbs', bc);
spUtil.setSearchPage('sc');
}
So for this to work without you changing the breadcrumbs code and markup, you would need to change the page titles for each of those pages to My Stuff and then inject Open Incidents or whatever into the breadcrumbs by broadcasting that event.
the other option is that you would copy the breadcrumbs widget and create your own custom breadcrumbs widget for those specific pages. In that custom widget, your markup might look something like this (untested):
<ul class="nav nav-pills nav-sm">
<li><a ng-href="?id={{portal.homepage_dv}}">${Home}</a></li>
<li><i class="fa fa-chevron-right"></i></li>
<li><a href="[put a link to your my stuff page here]">My Stuff</a></li>
<li><i class="fa fa-chevron-right"></i></li>
<li><a href>{{page.title}}</a></li>
</ul>
