Yes I'm using a few custom columns, but pretty sure they are coded correctly. The only one that is repeating is Calibre's series, and only on EPUB format when reading the title on my Nook classic.
Send to Device
Code:
{#mainseries}/{series}{series_index:0>3s} {title} - {authors}
Any Format -> Any Device --> Title
Code:
{#mainseries}/Dr {#dr} - {series}{series_index:0>3s} - {#seriesx}{#seriesx_index} - {title}
Expected Output to Nook
Dr Who/Dr 1 - Episode 1 - and the Unearthly Child
Dr Who/Dr 6 - Episode 143 - Trial 1 - Mysterious Planet
Title I'm getting on Nook
Episode 1- Dr Who/Dr 1 - Episode 1 - and the Unearthly Child
Episode 143- Dr Who/Dr 6 - Episode 143 - Trial 1 - Mysterious Planet