When using a colored print other than black, please make sure it is easily seen
I just about crossed my eyes trying to read your post.
Scented anything is not good to use with chinchillas ... fumes from the chemicals used to make these nice, pleasant smells can cause respiratory infections in the tiny lungs of chinchillas.
Blue Cloud is the best, if it is available to you. Otherwise, just make sure it is dust bath dust and not dust bath sand. The sand is not good for the chins' fur ... it will damage it.
Sounds like they are having urine fights ... I would probably separate them if it were me. Chinchillas are smart ... they may behave themselves when you are watching them, then act-up when you are not around to see it.
Are you absolutely posative all three chinchillas are males?How long are you leaving the dust bath container in their cage? Once they are finished bathing, they will often pee in the dust bath dust. If this is the case, you will need to dump it out, wash and dry the container and replace the dust bath dust when you are ready for them to take their dust baths again. They only need about 15 minutes each day in their dustbath.
Jo Ann