Yes... as the title says
its the bug thats been around since even before the dawnguard DLC come out

i'd totally love to know when bethesda are planning on getting of there lazy arses and getting this bug/glitch...whatever sorted
i cant do anything with the mannequins in ANY of my houses (built or built)

say i start a new game and place oh i dont know the hooded thalmor robes, boots and gloves for the time being, then feel like putting a full steel set on, fine and dandy...
then i feel like putting a glass set or elven set up....
this is when it starts to do my nut in...

it'll place one or two of the past equipments on and one of the newer placements on display....

i think i seem to have found a temp-fix to the issue by sticking a ring of sneaking and necklace of sneaking (not sure if it'd work for others)
then taking all the items off leaving and coming back.... roughly 45% of the time it works... and i can place a new set on display but
it just takes the P**S having to keep messing around just to place something on the mannequins (where ever it be... be it riften, solitude, Lakeview Manor) it is still a pain in the backside...

i've sent bug reports upon bug report via email to bethesda and all i got was ""thank you for reporting this to us""
its been what... nearly a year maybe more.. and the f**king bug is STILL not fixed WTF bethesda.......................

(Edit).. as there are people outhere who like duplication bugs....
before you end up saying ""ohhh duplication items is gooooodddz or whatever""
NO ITS FREAKING NOT.. it ruins the damn game... as if the numberous bugs dont ruin it as it is =/