The problem is that the game seems to carry support forward to a different attack even though some of the units concerned have moved. It looks like support for units is determined at the beginning of a turn, not at the point of an attack. In the example above, the 2 LF and 2LH were surrounding (touching) the Later Seleucid LF. So they were all supporting an attack. The rightmost LF (was at 7 o'clock relative to the LF before it was routed) attacked and routed the LF and chased it away. The MF is now about to attack the routed unit and it is still showing all the support from the previous position.
