Multicast Traffic Flooding NetGear MS510TXM

Hi, Pardon me if I am not on the right location.   I have a switch (MS510TXM) and starting to test multicast traffic.  I enabled IGMP snooping to prevent it from flooding all the ports with the multicast traffic.  It seems to work but however I can't  prevent it from flooding the multicast router port.  The uplink port is automatically becoming a multicast router port and all the multicast traffic is getting forwarded to our corporate network.

Here are my questions:

1. Is it possible to DISABLE multicast router port on all the port ?  It seems that the uplink port is always getting configured as  multicast router port.

2.  Is there a way to prevent or disable multicast traffic from egressing the uplink port ?

Thank you in advance!

-Eric