I would give it time, be patient.
I am going to cover all my suggestions just in case.
D-link router
Advance, Applications, create a new entry, enable, name (bittorrent), trigger port 6881-6999, trigger type TCP, public port 6881-6999, public type TCP, apply.
Sometimes, limiting your upload rate will increase your download rate.
I would set it to around 80% of the maximum rate observed.