Every time the system is ready to send out a cast, it evaluates if the lead has received the next highest priority piece of content. So if the lead misses a piece of content b/c they reached the communication limit, then the system will check to see which piece of content is the highest priority, and whether they received it or not.
YOu can trick the system by using programs. If you reference an external program in a stream, we will look to see if the lead is a member of the program. If htey are a member of the program, the system will skip it and move to the next highest priority piece of content.