I just installed the bitcoin software and bought some bitcoins at your link and I got this email: "...If the block count in your client matches the one shown a

I just installed the bitcoin software and bought some bitcoins at your link and I got this email: "...If the block count in your client matches the one shown at bitcoinwatch.com, your client should already show the transaction. Otherwise, wait for the two block counts to match..." My block count says 51,486 but the one at bitcoinwatch.com is over 100,000. Why aren't they the same? Will they be?