Connectify support service responded:
To explain how Dispatch works, whenever an application opens a socket, it decides which connection to use to send the data for that socket. Most traditional file transfer tools or streaming services only use one socket at a time, so Dispatch cannot accelerate that individual connection. Dispatch splits sockets among multiple Internet connections, so a single FTP transfer can only be put on one connection. You can however, select certain applications to use specific adapters in Dispatch Settings under the Application Tab. So if you were to start multiple FTP transfers or streaming services (assuming the program supports making multiple sockets), then you should see the speed of both interfaces.