All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad, sallallaahu ‘alayhi wa sallam, is His slave and Messenger.
Moving between Muftis in the manner you have mentioned leads to much confusion and disorder. Our advice to you is to neglect everything these Muftis have said to you, and your husband should go to the one of them who he believes to be the most knowledgeable and most religious and seek a Fatwa from him, and he should clarify to him what really happened. Then, he should act in accordance with what this Mufti says to him.
If a husband utters an indirect pronouncement of divorce, it will depend on his intention. If he has not intended divorce, then his divorce is not effective.
On the other hand, if he explicitly utters the words of divorce in a conditional divorce, not intending divorce, then some scholars, such as Ibn Taymiyyah, are of the view that he is obliged to offer the same expiation for breaching an oath, and some of them are of the view that divorce takes place, which is the view of the majority of the scholars.
For information about indirect pronouncements of divorce, please refer to Fatwa 90531, and refer to Fatwa 99468 about the conditional divorce.
On the other hand, you should know that the Islamic rulings are not subject to Istikhaarah, and one cannot know a law by Istikhaarah, but rather, by knowledge of the ruling. For a lay person, this is done by asking scholars specialized in the field, as Allaah says (what means): {So ask the people of the message if you do not know.} [Quran 16:43]
Al-Qurtubi said: "A layman who does not derive the rulings from their principles in regard to any part of his religion that he does not know because of him not being qualified to do so, is obliged to go to the most knowledgeable person of his time and his country and ask him about his case; and then he should act upon his Fatwa, as Allaah says (what means): {So ask the people of the message if you do not know.} He must endeavor to find the most knowledgeable person of his time in such a way that most of the people agree on him." [End of quote]
Nonetheless, it is acceptable to perform the Istikhaarah prayer in regard to the scholar one wants to ask, whether one should ask him or instead go to ask another scholar, for example.
Allaah Knows best.