inline-block column container adds a gap

I’ve installed Version 2.6.12, and I’ve got the question… Why .kc-col-container have display: inline-block; rule? Whats the point? o_O I’ve found how to change it (column settings -> style -> inside), but I just can’t understand why you did that, cuz inlining adds a gap under that block (I have complex section with numerous backgrounds, and this new gap between inner background and the end of section is horrible).
Well, if be honest, I have some more qustions to yours css, but this one really looks like a mistake, I’m pretty sure there is must be display: block =)