Combined 1 Standard (Lot 1469552, Part No. 5191-4557)

Is anyone else also having issues with Combined 1 Standard (Lot 1469552, Part No. 5191-4557)? We encountered unexpected results with the Combined 1 Standard (Lot 1469552, Part No. 5191-4557). While the Combined 2 and Class 1 & 2 standards yielded satisfactory results and passed the linearity test, the Combined 1 Standard failed the linearity test for all elements in it. I was wondering if it's a bad lot and if anyone else is also having issues with this standard. 

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