How does RTC plans take the information from the work items of an Iteration? And is it possible for work items from an iteration not to show in a RTC plan?

Hello,

Like the questions in the title say my doubts are the following:

1.- I have been checking documentation for RTC and how the plans get the information from the iteration they are set with. I have been doing some test plans on an RTC v6.0.3 and the plans are taking all the information from the current iteration the plan is configured for.

The thing is that in another RTC also in v6.0.3 there seems to be some work items that are being excluded from the plan. The iteration the plan is configured for has around 150 work items, while in the plan they are only taking around 45.

Thats where my second question comes in play.

2.- Is there a way in which the project area could be configured as to not let all the work items from an iteration to be loaded into the RTC plan automatically? If there is indeed any configuration for this i could thank you a lot if you let me know.

Thanks for your time reading this.
Regards.