300 gh/s Avalon, a 19 hour block and a BTC reward of 0.00002856!!! Might as well be an orphan.
Something's wrong with your stuff. I have only 200 Gh/s and my average block is .0045. My smallest block was .0034 for only an hour since the last and my largest was .0065 for only 29 minutes since last block.
I'm using an Antminer S1.
On the exact block you are talking about I got:
Total Shares Your Shares Reward
18829281958 3130134 0.00410163