Any Suggestions For Guatemala And Belize?

I am currently planning my holiday to Belize and Guatemala this summer for 4 weeks.

It's probably going to be 1 week Belize, 2 weeks Guatemala, and then 1 week Belize again. I arrive in Belize City and depart from Belize City.

The following is my plan but please help me out and let me know your suggestions if you’ve been or know someone who has!

2 days Caye Caulker

1 day Orange Walk Town (? worth it?)
The Lamanai tour

4 days San Ignacio

4 days Flores

4 days Lanquin

4 days Livingston

4 days Palencia

I could use your help so please write your thoughts and suggestions!