I dont know were the problem is, but if you correct the header (ie update it to current standard), the "bad" rendering disappears.
I've also seen some bad rendering with files using "Unofficial_Subpart". If I change it to "Unofficial_Part", it looks OK.
I hope this info helps.
I've also seen some bad rendering with files using "Unofficial_Subpart". If I change it to "Unofficial_Part", it looks OK.
I hope this info helps.