Thunderbolt Lacie Drive Causes Display Color Issues

I have a Mid 2011 iMac and the 2Big Lacie Thunderbolt drive. When I connect an external monitor to to the second TB port on the drive my external display turns purple. The drive still functions as normal. If I connect the external monitor directly to the TB port on the iMac, looks normal. I am using mini display to DVI adaptors. This issue did not start until after the last OS update (only change made to the setup). Had done this setup multiple times prior with no issue on this and a matching iMac. Only other time I have seen it, I was trying on a iMac with 2 TB ports with 2 displays, and the first through the drive was fine but the second direct to the iMac was purple. Any suggestions?

I believe the section you refer to is stating I can not connect multiple video adapters together. I am not.
From http://support.apple.com/kb/HT5219
"When connecting a Mini DisplayPort display or a display using a Mini DisplayPort adapter to a Thunderbolt peripheral (except as described in question 24), make sure the display is connected at the end of the Thunderbolt chain. You can use only one Mini DisplayPort device in the Thunderbolt chain."
"Mini DisplayPort Monitors or Monitors connecting with Mini DisplayPort adapters will not function when connected through a Thunderbolt Display. They must be connected directly to the Thunderbolt port on the computer or to a non-display device as indicated above."
I am connecting to a non-display device, not a Thunderbolt display.

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