what i am refering to is this.
(Edited)
http://images.akamai.steamusercontent.com/ugc/267222929310367305/4B7A3023F8F066B4D64D55DCBE991EB8CF4AD0F8/
the first picture is how it actually looks like.
http://images.akamai.steamusercontent.com/ugc/267222929310367796/723E8991804A3C36F0FD64710583BC68A5773E5B/
in the second picture it becomes a visual bug (after adjusting the thumbnail) due to the added parts upon the (Custom self made part) and the yor model turns from 10 grades to 2-3 grades to the side, and its really annoying when these two things happens.
(if the your part is zero grades it wont happen, but if you turn the part 10 grades to the side then it happens.)