Amended Extra Judicial Settlement (EJS)

Need your advice.  This is my first time to go through this process of settlement. 

We reside in the U.S. and are heirs to properties located in the Philippines.  We created an EJS and had it authenticated in the consulates here in the U.S.  but we found out that there are missing information that should have been included (e.g., Special Power of Attorney & Appointment of Estate's Administrator).  Can we create these two documents separately and still reference the EJS previously authenticated?  Or should we nullify the previous EJS and create a new one?

Any suggestions will help.  Thank you in advance!

Were you able to use the previous Extrajudicial Settlement of Estate? Were you able to transfer the titles to the properties listed there?

If so, you have no choice but to reference it.

But if you haven't used it yet, I think there's still a chance to just start from scratch and come up with a complete set this time around. Less complicated.