Hi Barbie,
 
You asked: " Has anyone found any significance in the extra days that the second month and 17 days would amount to? "
 
I believe so. If you read this page http://theopenscroll.com/beyond_veil/flood.html (Beyond the Veil - note the context) you'll see that I address Genesis 7:11. (most of the way down the page) The span of time is a model for our near future!
 
Blessings - Bob Schlenker