Deluge
First of all, I'm new user here, so my apologies if I'm doing something wrong.
A few weeks ago I've activated forwarding ports so that my modem would open a specific port to Deluge. The port used was 57084, it was working fine and I had disabled "Use random ports", so Deluge shouldn't change its active port. It worked for a few weeks, the active port was OK. However, today I realized Deluge wasn't neither seeding (uploadig) nor downloading, so I checked the Network settings out, and then I saw that the active port had changed to 43871. Again: the "Use random ports" box is unchecked! Ok, anyway I went to the modem settings and opened the port 43871. It worked once more, but now, just after a few minutes, I've realized Deluge is using another port (40097)!
What's wrong? I can't understand it. What should I do so that Deluge stop changing the active port? That's the screen:
