Second site with different cert is using cert of first site

Hello,

i have a weird problem with my IIS 7.5 configuration! I have two public IPs lets call them IP1 and IP2

I have two sites (dom1 and dom2) and two certs (not wildcard / cert1 and cert2).

The first site (dom1) is using the IP1 and cert1 and it works well

Bindings typ: https, hostname: blank, port: 443, IP: * also tried hostname: dom1, port: 443, IP: IP1

The second site (dom2) is configured with the IP2 and cert2 but it uses always the cert of dom1 

Bindings typ: https, hostname: dom2, port: 443, IP: IP2

In the nameserver both domains are pointing to IP1. Can that maybe the problem?

Any help on this would be very nice! Thank You!