General rules for online games.

After clearing something, you can either get rid of them or remove them from the army. Within a single day, saving won't help, although a save is still pending.

It's easy to track changes in the opponent's army by checking the tavern frequently. You can save daily if you suspect the opponent is cheating. But, in my opinion, there is no problem here; it's either an exaggeration or simply a lack of topics to discuss.