spells not hitting target

i was wondering if anyone elses is having this problem, while trying to heal the other day i noticed that my spell like prayer of mending we not going to the targeted player, like when trying to put prayer of mending on the MT it would fly off over to a random player or go to me it also happens when i cast heal and casued a few deaths on chimmy due to me trying to heal them above 10k and the heal goin to sum random. i was wondering if any one else was having this problem and if so any idear how to fix it??

this is my 1st post so soz if its in wong pace or the spelling it all that gd :P

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