Ok this has bugged me. I cast a spell or activate a skill and have it ready to use, but when i see a monster and there is a number for targetting him.. It usually changes when he sees me.. So i have to get in LOS to use my skill, but the second he sees me the target number has changed, if i try to cast it on him to soon then it might not work because the number changed, so i have to run to him and wait for him to aggro me and then target him just to be sure. ARGH.

i suggest that be fixed :(

The only way it changes is if he becomes your attack target and it will always be one. You can shut that off in options if you want.

i disabled costume targetting keys. It happens when healing too sometimes, the mob changes targets and suddenly the guy im healing is on a different hotkey. And sometims i'll have 1 2 and 4 for targets with no 3 being in sight !

thats because it trys not to change them if three was recently in sight it wont reuse it until that number isnt on the screen for so long should that target come back on. The only cycling that should occur though is when something changes to your attack target.