Question Connecting two monitors through single thunderbolt 3 port

Mahesh Abnave

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Apr 21, 2013
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I have Lenovo C940 Yoga 2-in-1 which comes with two Thunderbolt 3 ports. I also have Lenovo USB-C 3-in-1 Hub. This is image on above link:

But when I connect two monitors to thunderbolt, one from HDMI and another through VGA, the two monitors are actually mirrored, not fully extended. That is, when I click identify in Display settings, it flashes same number on both of them. Laptop displays number 1, and two external monitors displays number 2 as can be seen in this video.
But, I felt, laptop screen should show number 1, one of external monitors should display number 2 and the other monitor should display number 3. But that is not the case it seems. Why is it so?

Also note that Display settings window shows only two displays and that second display is basically both of two monitors:

 
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