I have a fleet with a lot of missiles, and I want to attack a shipyard that is 3 tiles away.  The first screen snapshot below shows that my ranged missile attack is supposed to have a range of 5 tiles.  The second screen snapshot shows where my fleet is located and where the shipyard is located (3 tiles away).  The third screen snapshot shows the range circle, which is only 2 and a half tiles for some reason, and the popup that appears when I hover over the target shipyard and says "Out of Range".  What is going on?

A save that will let you see this is located here:

https://www.dropbox.com/s/7cqlugiuj3rpz08/MissileRange.GC4Sav?dl=0

Use the Planets list to go to the core world named "Iridia", then look down and left for the Corporate Sector core world named "Ahriman II". There you will see what I described above and is shown in the screen snapshots below.