positive and xxx test in physiological tests

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For the sentence: "Methyl red test is positive and Voges–Proskauer test is negative"

MicroPIE is extracting "methyl red test|positive and voges-proskauer test" under tests positive.
MicroPIE is extracting nothing under tests negative.

MicroPIE should be extracting just "methyl red test" under tests positive
MicroPIE should be extracting "voges-proskauer" under tests negative

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A related example: "Catalase production is positive and oxidase production is negative. "

MIcroPIE is extracting "positive and oxidase production|Catalase production" under tests positive
MicroPIE is extracting nothing under tests negative.

Should be extracting "Catalase production" under tests positive
Should be extracting "Oxidase production" under tests negative.....