hii everybody

im on http://maxcoinpool.com and im mining with a R9 290x

the site shows im getting 98,956,046 khash/s ?!?! wtf

and that is showing on the round states

Round Shares Submitted shares since last found block (ie. round shares)
Est. Shares   2,784 (done: 17348.13%) <--------------------------------- what means this ?
Pool Valid   482,972
Your Valid   4,434
Pool Invalid   16,806 (3.36%)
Your Invalid   0 (0.00%)