It's very common and nothing to worry about. Main thing is that the divorces are finalized and documented properly, and the current relationship can be shown to be genuine.
Incredibly dependent on the situation. Obviously if there is minimal overlap between marriages, separation soon after arriving in Canada, etc. there is more concern. If both longterm relationships/marriages have significant time spent together in person then no issue and there is time between ending one relationship and starting the next one there is no issue. Divorce is very common. Assume neither of you have been sponsored or sponsored another spouse in the past 3-5 years.
