>The group may need to split up to outflank a threat, or to accomodate the mission parameters.

"This is getting out of hand, now there are two of them!" –Nute Gunray

More than one group may be necessary to accomplish the mission, which may need to split into many missions, possibly even contradicting each other.

Trust is earned, not demanded. Currently people are finding other trustworthy groups, and aligning to otther mission profiles to accomplish the greater mission. All you can do is try to re-earn their trust by giving accurate reports.