I don't speak Japanese, sorry! I do know javascript. Is the code in the client side of this the same stuff you're working with on your end? I'm not familiar with RPG maker's dev environment at all.
For 1: Don't know what the code looks like but my initial guess would be something like the AoE targeting indicator is using an out of date list of the enemies to display being targeted, rather than the currently alive enemies.
The character sprites seem to be reverting to the underwear ones rather than the drone ones when in the drone states.
Do the scissors drones do anything besides attack you the same as the baton drones? I would have thought they would be the ones stripping clothes but I haven't noticed them doing it.