Conflicting answers of Istikhaarah

Assalamu alaikum,

I am a bit disturbed because I did the Istikhaarah procedure two times for a proposal for Nikaah.

The first time, you told me the istikhaarah is negative : http://www.alislam.co.za/qna/dream-after-istikhaarah-for-nikaah/

The second time, you told me it was positive : http://www.alislam.co.za/qna/dream-after-istikhaarah-for-nikaah-2/

Can you shed some light on it ? And also what then should I decide about the proposal ?

Jazakallah.