I recently notices when I invade a system that the option Blitz and Infiltration are mixed: The description of "Blitz" says: "The battle will be one round faster and the attack troops will have an efficiency bonus", but below that it says: "Effects: -50% health on invading troops, +2 battle duration". It's the other way around for Infiltration. Considering their names, the description makes sense but the effects do not.