unlimited bandwidth not unlimited?

It seems that there is an issue with file transfer speeds, particularly that unlimited is not really running unlimited.

When testing on a connection that has 15Mb/s between the servers over a wan i'm only getting a max of around 2Mb/s even with the unlimited option enabled.

if i test with other SFTP software like FileZilla i get the full 15Mb/s.

not sure if this is a bug or expected but i figured i'd pass it along.

thanks