Do you mean that the same packet was observed on more than 1 port?
But there are many servers that service requests on different ports and gets listed just as there are some servers that only service on a single port.
In the below example the *.22 server is interfacing many requests but all on different ports and still has one that is undefined.
The same is not true for the *.25 server that only has a service on a single port, which is not listed?
I should expand on this Ulf. The server port is dropped if there is more than 1 port in a single rule of a software service. If the software service has multiple rules that each only have one port then it will be reported.
Yes - I realized that after a while (check above - just needed to read Adams answer a bit slower).
It's bit tedious though as when you want to know that your SSs are configured as whatever documentation you've been handed, the ones with more than 1 port is "anonymized" and you have to go to the RUM console to find out how they are configured.