First thing is:
When I reduce or add the number of items on the Item count, should the same number of connectors be updated on the node? I mean, if I only have 2 Items, the node still shows the 14 slots.
Have a look at the image I attached.
Hi Cyrus3v. The map actually shows 15 slot - starting with slot 0 (instead of 1). So 14 connecting to slot 15 is correct, but not logical.
ad1. I think it’s ok or otherwise it would delete some of the slots if you connect something there, reduce number, change your mind, increase it again
ad2. probably naming issue
That was I thought. It isn’t very logical.
Regarding the first situation, I was thinking about the Multi/Sub-Object node that once you set the number of sub-materials, it updates automatically the node. It’s not a big issue, but it keeps consistency with 3ds max.
But it is on the right track. 
CoronaMultiMap inside Color Correction : if I change Color Correction, nothing happens
CoronaMultiMap and IR : every time I move the camera, the object, or I change everything (add a sphere), the object color changes! Funny! 
With producer render, it’s ok!
With me the textures I connect the MultiMap are rendered slightly darker.
using mix amount by any chance?
No. Is not a big deal, but you can see a slight change in the color.
there should be no change, I am interested in a scene
I will get back to you tomorrow. I have that scene back work.