Dual PTR?

Hi. We're having some issues regarding this dedicated server. We run alot of small dedis but this one is causing alot of issues. Our rDNS is perfectly fine. Our current IP is 65.108.50.140 and rDNS is static.140.50.108.65.clients.your-server.de. But for some super odd reason I am getting 2 rDNS adresses in our email. (static.114.180.21.65.clients.your-server.de). This was our last ip. I got a HELO_DYNAMIC_IPADDR error back before we changed ip too.