I cloned a JO that was working properly, made a slight adjustment and then set it to deploy the following day. It appears the JO sent out emails based on applicable participants at the time in which the JO went active. For example, the JO includes a program that is kicked off based on an event that occurred equally to the span of yesterday. On 5/21 I synced the program to test it and it was working properly. I then scheduled the first deployment to occur the following day. It deployed the following day based on the participants that had been synced the day before. Is this a bug?