Did not get the full amount of BAT in my wallet

Over the last month I managed to make 0.8 BAT but when the payout to the wallet came today I only got 0.250 BAT and still have 0.6 BAT in my unpaid section, so why did this happen

@_Jonathan I think you can only receive rewards between may 1st to may 31, the rewards u earned between june 1st to june 30 will credited on next month.

but my pending rewards did become less and i did not recieve all the pending rewards, and I only have had the browser since last month anyway
pending rewards