The status commant in sp_ctrl show two import process for single post queue. One of the import is idle and has no PID.
sp_ctrl (xxxxx:2100)> status
When NAT (Network Address Translation) is used two import processes get created one pointing to the external IP Address and another pointing to the physical address (internal Address)
It is normal to have two import processes when using NAT. It does not interfere with replication.