UPS tracking vs. Amazon tracking?

I would go by the UPS, for one main reason, Amazon has it leaving and arriving in a minute. Everything coincides to when your package arrives and departs,-times may vary- until July 3 in Mesquite TX. UPS and Amazon both say your package arrived and departed Mesquite TX, on July 3rd, 2010. However, Amazon has your package arriving in Vernon, CA a minute after it left Texas. Left TX @2:37 AM and arrived in CA @ 2:38 AM. I will guess you package should be there in CA this week- July 5-, since it has already left TX.