Numbers and Rashi
You explain that Jaimini tends to reason on the Rashis by numers (not symbol - Ariet like 1, Taurs like 2 ecc ). In your couse of Medical Astrology I have fond numerlogy view in the pdf. Have you got the focus course o readings about this argument that can connect with the sutras?
I do not have a course like that.
no, not at all, do not relate Jaimini sign meanings to house.
That's strange, it seems your dictionary is flipping meanings of khecara with kheta. what dictionary is it? Also read this which confirms kheta meaning as I my dicionary has it. Kheta, Kheṭa, Kheṭā: 23 definitions (wisdomlib.org)