For the simulation i used Riverbed Modeler. Could someone explain why 10Gbps Ethernet has lower throughput in bits/second than 1Gbps Ethernet for 500Mb file?

I am sure that the configuration i used is correct because the rest simulations are normal.

Gbps-500Mb 10Gbps -500Mb 100Mbps- 500Mb 1,200,000,000 1,100,000,000 1,000,000,000 00,000,000 800,000,000 00,000,000 600,000,000 00,000,000 400,000,000 300,000,000 200,000,000 100,000,000 2m 0s 5m 0s Gbps-500Mb 10Gbps -500Mb 100Mbps- 500Mb 1,200,000,000 1,100,000,000 1,000,000,000 00,000,000 800,000,000 00,000,000 600,000,000 00,000,000 400,000,000 300,000,000 200,000,000 100,000,000 2m 0s 5m 0s