This is not a bug, but a kind of a tricky situation.
The hoplites can not charge either of the tribals (due to the rule stating that an outside FA enemy BG can not be charged if the charge hex has any combat able enemy BGs), and also can not charge the enemy leader (as it can not charge an enemy BG passing through other enemy BGs ZOCs)
Please provide the game save file.
You don't need to manually save anything, the game automatically saves all the games you're playing in the (temporarily) SavedScenarios folder. For SP scenario games you need to look for a file named Akagras <date>.gsv.pck (the game save pack), while for a SP DAG game you need to look for files named DAG <date>.gch.pck (the game cache pack, ie the DAG "scenario pack), and the DAG <date>.gsv.pck (the game save pack).
Put all needed files (logs, game saves, game caches, etc) in a .zip archive and attach it in here, or send them (or the archive) to me via the known email from the readme, please.
Also, you can resume/replay any of the games you've started via MainMenu -> Load Game menu