Those 'W:' lines are just warnings, that do not trigger the error you are facing. Still you might want to get rid of them: The GPG error: There is some OVI repository fremantle-1.2 which is useless in PR1.3, so disable it. For the conflicting distribution error you might look at the extras repository.

The links are no links but the repository server addresses, but the forum software make automatically links from it.

None of this all is crucial for HAM.
Did you try a reboot?