[raztoki]

depending on the plugin and its hard upper limits defined, (assuming those are 20)
max chunks * max sim dl = total connections.

you can understand that 20 * 20 = 400 connections. Most end users do not have enough bandwidth available for that many connections. It then leads to socket disconnections via timeouts.

I can max my connection out with 1 * 1. So the other 399 connections are pointless. =]

my recommendation is to test out how many connections are required to keep your connection maxed out. What plugins you use (as they can define how many chunks*max sim dls you can use). If you use a plugin with lower chunk values than you like, you can get away with higher max sim dls to make up the connection count. It can be slightly variable based on plugin but also the hoster might have its data servers in a different location than another, and downloads could be slower.

trail and error =]