Stale is correct share but you are late someone else allready solved that share. It can cause if network bad but your ping is good. 2nd is your hashrate is too low. You have 30mhs and you are mining on ethermine which is pplns system 4000mhs difficulty. You must find another pool or you must have at least 100mhs speed.
Rejected share is incorrect share happens due to high OC
Most of my rigs are showing 4295MH. One of my 1070 rigs is showing still 4.000G and is still getting shares accepted. Maybe will change on reboot. Havent noticed any change in hash rate...still 2.7Ghs. Still under 1% stale and 0 rejects.