NSRangeException with animating tableview

Question

Hey guys,

The following code is called with lastRemoved and lastAdded being:

data lastRemoved:
(
)
data lastAdded:
(
    <NSIndexPath 0x4b2cf60> 2 indexes [0, 9]
)

Then I get a NSRangeException:

"* Terminating app due to uncaught exception 'NSRangeException', reason: '* -[NSMutableIndexSet addIndexesInRange:]: Range {2147483647, 1} exceeds maximum index value of NSNotFound - 1'"

My question is why I get that exception. How does it get that weird NSIndexPath? As you can see I don't pass it.

- (void) updateTableview {
    UITableView * tv = tableViewController.tableView;
    [tv beginUpdates];
    NSLog(@"data lastRemoved:\n%@", [[data lastRemoved] description]);
    NSLog(@"data lastAdded:\n%@", [[data lastAdded] description]);
    [tv insertRowsAtIndexPaths: [data lastAdded] withRowAnimation: UITableViewRowAnimationFade];
    [tv deleteRowsAtIndexPaths: [data lastRemoved] withRowAnimation: UITableViewRowAnimationFade];
    [tv endUpdates];
}

I have a hunch that it's because I'm adding a row at index 9 but I only have 3 rows. Can anyone confirm this?