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No it does not do that by default and no you don't need to open a ticket for it. Also if you have 16 gb of ram do not allocate all of it as that wil cause issues, 6gb should be enough.
This pack is not an FTB modpack so I suggest contacting the correct people for help.
If you are running the pack through curse then there is a chat group for the pack there.
It looks like a chunk error but not sure how to fix it.
Did you change the pack after creating the world.
You could, depending on where you are, move yourself to another location and see if it wil load up. Use mcedit to do that if you want to try.
You are correct about the memory issue. The pack requires 4gb minimum and you only have 4gb total. So unfortunately you will need more memory. It will run with 8gb but will benefit from 16gb.