ULPAnalog
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Is it a capacitive coupled amplifier? If so, is this 15pF input capacitance or the feedback capacitance?
Extracted netlist generally does not have mismatch enabled and needs to be explicitly added (in most cases). Therefore the issue might not be related to mismatch but rather due to parasitics. Moreover good matching practices include laying both feedback capacitance and input capacitance in a common centroid fashion and adding dummies to create similar looking environment for all caps.
Please post the schematics, pre and post layout sims, including the extraction type (C+CC or R+C+CC) to better understand the problem.
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