Actually, this seems like a good Idea to me... But just the info about whether the attack landed or not. just one more column.
Maybe something like:
Recalled
yes
yes
no
no
and so on. that would really help in figuring out what planets recall thier attacks on you at the drop of a hat... and what planets you have attacked have a tendency to get defence. Of course, it's entirely possible that I don't know what I'm talking about