I plan to have 2 seedboxes from different providers to compare them side to side.
Is it a potential problem with some trackers?
Notably [c]hdbits ones?

2 seedboxes wont be a problem for most trackers as long as u dont leech the same torrents from different ip.

But u may avoid possible troubles by notifying the admin by listing different ips of your seedboxes in your Signature.

CHDbits gives me "already downloading" error for every new download and it takes an hour to flush it out. And then it comes back sometimes.
I think it was because I had and cancelled previous seedbox - but that is just my guess.

Multiple seedbox is not the reason why u get that error information from the tracker.

Have u already downloaded the torrent and delete it without stop it at first? It might be a possible reason.

If it happened to all the new torrents, I guess u are sharing IP with someone who happens to download the same torrents as u.

Originally Posted by Cigar

2 seedboxes wont be a problem for most trackers as long as u dont leech the same torrents from different ip.

But u may avoid possible troubles by notifying the admin by listing different ips of your seedboxes in your Signature.

Agree. Notify admin if downloading from more than one seedbox. Multiple download ip addresses can raise red flags on trackers.

Thanks for ideas.

Interesting.... i wondering then - how come i get this warning for torrents I never touched before?

If it happened to all the new torrents, my guess is that u are sharing IP with someone who happens to download the same torrents as u.

You can try an old torrent (one year ago), if it still happens, u should ask the admin to solve this problem.