First of all, I am not the admin for Gridcoin, so if you have any problems you can take it up with him!!
So let me do the math for ya.
http://pool.gridcoin.us/CoinExchangeStatus.aspx --> Total Classic Amount Converted: 30,269,813.269 GRC
http://explorer.gridcoin.us --> GRC classic Coinbase Amount: 31555144.7083
31555144.7083 - 30,269,813.269 = 1285331.4393
So that is approximately 1.28 mil classic coins that have not been burned.
The conversion from Gridcoin Classic to Gridcoin POR was announced in October of 2014 and ended on April 20th of 2015, so a few days ago.
Like I said, I don't know what else to tell ya.
Everyone in this community converted their coins, except for you!
I went to the Poloniex trollbox for about 5 minutes and somebody else showed up asking what happened to Gridcoin.
So you're a liar.
Would you like to provide us with some numbers showing the total coin supply compared to the number of coins burned?
Of course you wouldn't, because then we'd have a better idea about how many people got screwed out of their coins.