ng-repeat does not seem to rebind ng-click on a re-rendering

ng-repeat does not seem to rebind ng-click on a re-rendering

I have an ng-repeat assigned to a row in a table as shown below. When the
user selects a down arrow in the row, the method moveDown gets executed,
which reorders the list (see code).
When I look at the DOM, everything looks right - The rows are reordered,
and the ng-click sees the newly assigned seqNbr.
Better explanation:
Initially first row shows data-ng-click='moveDown(0);' second
data-ng-click='moveDown(1);'
After selecting the first one, the first and second row trade places. The
seqNbr are swapped in the objects and list is reordered, then the
ng-repeate is reexecuted.
Now the DOM shows that the NEW first row has: data-ng-click='moveDown(0);'
and the old first row, now the second row, has
data-ng-click='moveDown(1);'
However if I select the new first row, what gets executed is moveDown(1)
(the old method associated with that row). Its as if the DOM is updated,
but not the method binding.
HTML:
<tr class='evidencerow' data-ng-repeat="e in data.evidence">
<td><div class='assertion webdiv' style='height:4em;'
data-ng-dblclick='openReference(e);'>
<span data-ng-bind-html-unsafe='e.assertion'></span>
</div>
</td>
<td>
<img src='img/UpArrow16x16.png' data-ng-hide='$first'
data-ng-click='moveUp({{e.seqNbr}});'
style='width:32px;'>
<img src='img/DownArrow16x16.png' data-ng-hide='$last'
data-ng-click='moveDown({{e.seqNbr}});'
style='width:32px;'>
</td>
</tr>
controller code:
$scope.moveUp = function(seq) {
var recs = $scope.data.evidence.slice(0);
recs[seq].seqNbr = seq - 1;
if (_ev.notEmpty(recs[seq - 1])) {
var s2 = seq - 1;
recs[s2].seqNbr = seq;
}
recs.sort(_ev.compareSeqNbr);
$scope.data.evidence = recs;
};
$scope.moveDown = function(seq) {
var recs = $scope.data.evidence.slice(0);
recs[seq].seqNbr = seq + 1;
if (_ev.notEmpty(recs[seq + 1])) {
var s2 = seq +1;
recs[s2].seqNbr = seq;
}
recs.sort(_ev.compareSeqNbr);
$scope.data.evidence = recs;
};
This behavior doesn't seem right to me. The result is instead of the rows
moving up and down, they toggle back and forth.