I have been with Wal-Mart five years and three months altogether...I STILL think you should at least have a 90 day period to come back and work for Wal-Mart and not lose your seniority...I was SO fucking close to getting my five year pin it was unreal...all because of a stupid dept manager whom I rarely saw ANYWAYS...but she did MTR me 10 Verizon RAZRs and I gave her 15 Virgin Mobile ARCs...but still!  I still wear the "five years of service" sticker on my name badge, as if I never left!  Nobody at my store cares really.