Sunstrip limited to 9 cells in magic sheet

Hi, 

I've tried to make pixel grid with Sunstrip Active using a multicell device.
If my channel's device is121, I can add 121.1 thru 121.9 but impossible to have 121.10.
If i choose to increment channels with magic sheet tools 121.10 become 121.0 and if I try to enter 121.10 in target, it become 121.1
I tried in eos magic sheet, it works fine.
Any tips for me? (except converting sunstrip device to 10 channels)

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