Could you give me a link to the page where too much information is lifted from your bibtex file?
For downloadable PDFs, you have to follow the instructions:
1. Create a folder in wp-content/papercite-data, with two subfolders: bib (this will contain the bibtex files) and pdf (this will contain the PDF files).
2. Copy your bibtex files into the bib folder, and your pdf files into the pdf folder. To match a bibtex entry with a PDF file, the PDF file should have be named KEY.pdf where KEY is the bibtex key in lowercase, where : and / have been replaced by -.