We recently switched webhosts from Databse Mart to Liquid Web. This weekend we updated the name servers with our registrar and about 48 hours later, we saw our new site on insidestl.com. Now, a day later our old site starts showing up again! Every couple of minutes the site switches. When I used http://whatsmydns.net/ it seems to have propagated to our new site.Running ping on windows, about once a minute you can see it switches from our old ip, to our new back and forth. Pinging insidestl.com [198.64.251.50] with 32 bytes of data:Reply from 198.64.251.50: bytes=32 time=68ms TTL=108Reply from 198.64.251.50: bytes=32 time=73ms TTL=108Reply from 198.64.251.50: bytes=32 time=69ms TTL=108Reply from 198.64.251.50: bytes=32 time=69ms TTL=108Ping statistics for 198.64.251.50:Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),Approximate round trip times in milli-seconds:Minimum = 68ms, Maximum = 73ms, Average = 69msC:\Windows\system32>ping insidestl.comPinging insidestl.com [198.64.251.50] with 32 bytes of data:Reply from 198.64.251.50: bytes=32 time=68ms TTL=108Reply from 198.64.251.50: bytes=32 time=80ms TTL=108Reply from 198.64.251.50: bytes=32 time=81ms TTL=108Reply from 198.64.251.50: bytes=32 time=67ms TTL=108Ping statistics for 198.64.251.50:Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),Approximate round trip times in milli-seconds:Minimum = 67ms, Maximum = 81ms, Average = 74msC:\Windows\system32>ping insidestl.comPinging insidestl.com [67.227.192.78] with 32 bytes of data:Reply from 67.227.192.78: bytes=32 time=24ms TTL=50Reply from 67.227.192.78: bytes=32 time=25ms TTL=50Reply from 67.227.192.78: bytes=32 time=25ms TTL=50Reply from 67.227.192.78: bytes=32 time=24ms TTL=50Ping statistics for 67.227.192.78:Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),Approximate round trip times in milli-seconds:Minimum = 24ms, Maximum = 25ms, Average = 24msC:\Windows\system32>ping insidestl.comPinging insidestl.com [67.227.192.78] with 32 bytes of data:Reply from 67.227.192.78: bytes=32 time=36ms TTL=50Reply from 67.227.192.78: bytes=32 time=23ms TTL=50Reply from 67.227.192.78: bytes=32 time=25ms TTL=50Reply from 67.227.192.78: bytes=32 time=25ms TTL=50Ping statistics for 67.227.192.78:Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),Approximate round trip times in milli-seconds:Minimum = 23ms, Maximum = 36ms, Average = 27msAs you can see it switches back and forth between 67.227.192.78 which is the new IP and 198.64.251.50 which is our old one. 
DNS resolves my hostname to 2 different IP's back and forth within minutes
domains;web hosting;dns;nameserver;migration