Imp hunters mark being over written by hunters not haveing imp mark, i tryied reloging and to no result, i have 5/5 imp hunters mark, yet other hunters who do not have the imp mark always over rideing my mark so that the malee does not get the buff since their's is not talented.

Chasedfour

This is working correctly, once improved hunter's mark is on a target any Hunter's mark (improved or not) will refresh the duration of the existing mark (not overwrite it).

The buff does not change in any way just the duration remaining.