These groups had a hard time because they misunderstood each other.
Misunderstanding simply means failure to understand others. It is miscommunication and can bring about arguments.
In this case, before arriving at a particular decision, it's vital for group members to brainstorm and give different suggestions regarding the issue at hand, and the best decision is chosen.
In this case, the best decision can be chosen which will then help in avoiding misunderstanding.
