Why so many dups?

[nadeaup]

I am getting a lot of duplicates with my rockminers. enough dups as to it having an effective hash rate at about 100 gh/s lower than the work it performs. All devices are on the same network and ghash pool. I also tried slush which had similar results..  Any ideas?

3 = S3 Antminer
2 = S1 Antminer
5 = S1 Antminer
1 = Rk-Box Rockminer
6 = R3-Box Rockminer



Any idea why duplicates are so high for the Rockminers? The S3 & S1's seem normal...