Not sure I understand you correctly but if you are seeing 2 of every Dot then you may have a clone timer going. If you are applying Dark Intent on a target (enemy)? you should be placing that on a friend. Are you sure you're not just seeing cooldowns of spells as well as that same spells damage?
Forte will by default track every debuff from every player on every target. You need to go into the mod settings (/fx) and disable all the current options. What I find works best for me is to manually enter the spells I wish to track with individual colors and appearance settings.