Husband and wife reconciling after obtaining a divorce from a non-Muslim court

Q: I was married to a man in Canada and lived with him for many years. Unfortunately, we had many problems and fights, until I left him and returned to my country of Bangladesh.

My husband did not want to divorce me, so I obtained a divorce from the non-Muslim court.

A few years have passed since the court issued the divorce. I now want to reconcile with my ex-husband and remarry him.

My question is whether we need to repeat the nikaah or whether the nikaah is still intact, as the divorce was issued by the kaafir court and my husband did not want to divorce me.

Whirling dervishes, long zikr programs and burying someone with a piece of the Ka'bah cloth

Q: Clarification on zikr, self hypnosis in regard to some sufi practices.

1. Are self-hypnosis techniques like whirling dervishes common during the Rumi era, haraam? Are their practices considered a bid'ah?

2. Likewise many groups hold zikr sessions which last a long time. It includes chanting, is this considered a bid'ah?

3. Many buzurgs get buried with a small part of the kiswa fabric. Is this considered a bid'ah? Is calling any of these practices openly a bid'ah, haraam?

Accepting fuel allowance for a month from a company even if one does not require it

Q: If a person is under employment (working for someone) and fuel allowance is also included in the contract (given in cash), however, if a month/week comes wherein the employee has enough fuel in the vehicle and therefore, for that particular month/week, he feels that he doesn’t need the fuel, should he still accept the cash or not, because it is in the contract? 

Calculating zakaat at the end of one's zakaat year

Q: If a person works for some years and every year, he has to discharge zakaat for example in Dhul-Hijjah. (basically his zakaat year ends in that month and discharges zakaat then). After some years, he opens up his own business from the savings he has accumulated. Thereafter, when should he now pay out any zakaat due on him? Should such a person continue discharging zakaat in Dhul-Hijjah, or he has to take a new date because of the business?