D1 and D9 may give different information as they are different charts but ultimately D1 is your primary chart and D9 is the divisional chart. Both have to be read simultaneously before any prediction is made. For example, you and your body are the same, I cannot separate one from the other and say they are two different people. Similarly, D1 and D9 may be different charts but of one individual. So they have to be read in coordination when predicting.
I hope you understand.
Blessings,
Navneet Khanna
Astrologer