Thx for the fast and accurate response.
So i gotta do what i have to do

lvl the merc by hand.
by the way it can be rather tedious to lvl up the merc for about 50 levels+ everytime when u wanny try out a new merc.
But anyway just for information, currently i'm playing RoS merc level depends on difficulty settings in this mod u can get a new merc in normal on something like level 20, on nightmare on lvl 40 and hell on 60 (ca.).
On Eastern Sun mod all Mercenaries on all difficulties was about level 20ish.
re-lvl mercs anytime i equip a new one is just rather boring, instead i could do x runs on mephi or whatever, rather to spend time on normal again to let that merc live longer.
Of course this is only my opinion, but like LOD 1.12 or something like that (just how Seltsamuel said i think) u should get new merc on a lvl -5 near to yours (or around that number).
I really would appreciate some fix on that issue.
Please do not understand this as a beg on fixing something, but as a personal interest on my own

Thx Again all u guys that made this game so outstandind troughout the years.
Special Thanks goes to you Seltsamuel, without u i think Diablo 2 and his community would have missed a lot good features.
Keep this nice work up
greez all