I get double entries to my calendar when I sync. How do I delete the extra event.

Question

I have double entries to my calendar after a sync.  How do I prevent this from hapening and how do I delete the extra events.

Answer 1

I installed iSync from my SL backup and all went well as it showed up in my applications and when brought up on the screen, launched, I reset the history.
When trying to sync my calendars again I first uncheck all calendars via iTunes, syncronized and then check the one I wanted and syncronized again. No difference, ended up with many multiples.
I then searched a little further using spotlight typing in just iSync and a developer file showed up that looks like it is designed to reset the history but no sure. I opened in in Komodo but don't know how to proceed from there.
Here is the file: Under Usage it seems I could run this file but not sure how to. Could you help with this or am I on the wrong track?
Thanks
LarryB
#!/usr/bin/perl
# usage:  resetsync.pl [push clientid| full | list]
# Copyright (c) 2007, Apple Inc.  All rights reserved.
# Usage: To reset sync history run this script with no arguments or the single
#command line argument "full".  To push the truth from a client run this script
#with two arguments, the keyword push and the client identifier. Known client
#identifiers can be listed if you run this script with the single command line
#argument "list".
use SyncServices;
my $syncmgr = ISyncManager->sharedManager();
if($ARGV[0] eq "push") {
  # Have a client push the truth. Note that pushing the truth can cause data loss
  # if other clients have registered schema extensions.
  if(@ARGV != 2) {
          print STDERR "resetsync.pl [push clientid| full | list]\n";
  my  $client = $syncmgr->clientWithIdentifier_($ARGV[1]);
  if($client) {
          $syncmgr->pushTruthFromClient_forEntityNames_($client,$client->enabledEnti tyNames());
elsif($ARGV[0] eq "list") {
  # Get a listing of registered client identifiers
  my $clientIds = $syncmgr->allClients->valueForKey_("clientIdentifier");
  print join("\n", listOfPerlStringsFromNSArrayOfNSStrings($clientIds)) . "\n";
elsif($ARGV[0] eq "full") {
  # Completely reintializing sync state
  $syncmgr->reallyResetSyncData();
else {
  # Resetting sync history
  $syncmgr->resetSyncData();