[PCB] How to specify 1-layer or 2-layer?

"Failed reason: Please confirm if it is a 1-layer or 2-layer board."How do I specify that a board is 1-layer or 2-layer? (I already set this when submitting the order.)Do I contact somebody?...

[PCB] Properties For A Two Layer Board

What is the standard stackup for a 1.6mm thick two layer board? I can only seem to find stackups for four layers and up. Thanks!
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