inner_border_width changes both "middle border" and inner border sizes

[rice7th]

Before going any further, i need to specify that the "middle border" is the yellow part of the window in the screenshot below:
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Changing inner_border_width changes also that "middle border". Here's an example with a size of 10:

And here's it with a size of 1:

As you can see, i want to be able to preserve that middle border without having the inner border since it basically obfuscates the sides of every window, and trust me, it is not fun.

I am not really sure if this is a feature or a bug, but in both cases i think these two should be two separate things, e.g. berryc inner_border_width and berryc middle_border_width