I have not done this journey, nor a journey that involves a domestic with RJ. However the principal of needing to get your bags would typically apply on an international to domestic journey where you need to present your bags to customs (and yourself to immigration) for your bags and you to be cleared to travel internally within the country.

The baggage/customs shuffle would not be needed on the reverse a domestic to international connection because there is not the same scrutiny on what your leaving the country with. You would however need to clear immigration on your connection.

I strongly suspect that a scheduled connection of 30mins at AMM is below the minimum connection time. If some kind sole wandering past this topic can check this on Expert Flyer they should be able to confirm it.