This was a fascinating read for me because I happened across this by chance with my own thesis site. As it is a cartoon/humour blog I do a cartoon with each posting. I had been concentrating on the SEO for the posting, but neglecting it for the cartoon. One day by chance I thought, ‘I wonder if this will make any difference..?’
Suddenly my blog appeared on Google Page 1, Top Cartoon Blog…then popped up all over the Google rankings, even Best Humor/Humour Blog, Pages 1 and 2!
I admit to buying thesis as a complete SEO virgin thinking I needed all the help I could get … now I can absolutely vouch for its merits. Thank you!!
Your code snippet doesn't indicate what comes immediately after the end of the group in which \doublespacing is in force. It also doesn't indicate what's at the end of the file -- specifically, whether there's either an implicit paragraph break (., one or more all-blank lines) or an explicit paragraph break (., \par ). At any rate, it appears to be the case that there is currently no implicit or explicit paragraph break between the end of and the subsequent material; it would certainly explain why the final paragraph of the abstract is spaced differently from the preceding one.