I noticed something amusing today. Can you spot a difference between these two fragments of cgminer logs:
[2014-04-23 04:08:23] Network diff set to 766
[2014-04-23 04:08:23] Stratum from pool 0 detected new block
[2014-04-23 04:09:00] Network diff set to 901
[2014-04-23 04:09:00] Stratum from pool 0 detected new block
[2014-04-23 04:09:14] Network diff set to 1.01K
[2014-04-23 04:09:14] Stratum from pool 0 detected new block
[2014-04-23 04:09:15] Network diff set to 314
[2014-04-23 04:09:15] Stratum from pool 0 detected new block
[2014-04-23 04:09:40] Network diff set to 288
[2014-04-23 04:09:40] Stratum from pool 0 detected new block
[2014-04-23 04:09:49] Network diff set to 299
[2014-04-23 04:09:49] Stratum from pool 0 detected new block
[2014-04-23 04:10:40] Network diff set to 317
[2014-04-23 04:10:40] Stratum from pool 0 detected new block
[2014-04-23 04:11:26] Network diff set to 319
[2014-04-23 04:11:26] Stratum from pool 0 detected new block
[2014-04-23 04:11:29] Network diff set to 325
[2014-04-23 04:11:29] Stratum from pool 0 detected new block
[2014-04-23 04:08:23] Network diff set to 766
[2014-04-23 04:08:23] Stratum from pool 0 detected new block
[2014-04-23 04:09:00] Network diff set to 901
[2014-04-23 04:09:00] Stratum from pool 0 detected new block
[2014-04-23 04:09:14] Network diff set to 1.01K
[2014-04-23 04:09:14] Stratum from pool 0 detected new block
[2014-04-23 04:09:18] Network diff set to 314
[2014-04-23 04:09:18] Stratum from pool 0 detected new block
[2014-04-23 04:09:39] Network diff set to 288
[2014-04-23 04:09:39] Stratum from pool 0 detected new block
[2014-04-23 04:09:48] Network diff set to 299
[2014-04-23 04:09:48] Stratum from pool 0 detected new block
[2014-04-23 04:10:40] Network diff set to 317
[2014-04-23 04:10:40] Stratum from pool 0 detected new block
[2014-04-23 04:11:25] Network diff set to 319
[2014-04-23 04:11:25] Stratum from pool 0 detected new block
[2014-04-23 04:11:29] Network diff set to 325
[2014-04-23 04:11:29] Stratum from pool 0 detected new block
The first one is from CleverMining, the second one from WafflePool (or maybe it's the other way around). Great minds think alike?
Actually what you are reading is from one pool, not from both. whichever one "pool 0" is in your settings is just reporting a change even if it's not the pool actively being mined on. I only figured this out (by accident) after having two machines side by side, one on a stable LTC pool with Clevermining as a fall over and the other on Clevermining with the LTC pool as it's backup. The network dif changes (in my case, from clevermining) were reporting instantly on both machines at the same time even though they were technically mining on different pools.