Planetary Bombardment Question.

[Chrowl]

Hi all, I'm relatively new to the game (been lurking around here about 2 weeks), and in the course of my discovery I haven't been able to pin down exactly how damage is resolved in certain situations. Let me give an quick example:

(V. Gold pre-patch) After reducing any defending fleet units I'll either stand off with missiles (with a range advantage), or flit in and out of firing range to deliver my payloads. However, I seem to be generating a lot of 'misses'(no explosion animation or damage total increase) with the missiles even from a few spaces within max. These misses seem to decrease with the range somewhat. And I also notice that it seems that a single 'hit' will destroy exactly one weapons platform regardless of volley weight (I'll often fire a few small Groups because they seem to be adequate and avoid potential overkills on smaller worlds).

I'm wondering if there is an inherent ECM for the planet, I'm seeing the effects of troops present, the platforms are being only partially damaged, or what? Thanks in advance for your replies. I'm really looking forward to participating in this community.