PVP Parry dodge issue

Hello
Im new to feral druid and have some toughts, is it normal that I get 4x dodge or 4x parry in a row from pvp geared players?
Such thing never happen to me as a pala, warrior or dk, only as feral druid, is it normal? Do I need expertise to be succesful with feral? Cause attacking from behind 100% time is impossible

What I noticed that mostly Mangle get dodged or parried often, % of dodges reach 18% at recount

For example today at bg fire mage dodges me 2 to 3 times in a row every time i fight against him, mage have 0 dodge buff in fire spec, have no idea what is going on ;o

another example - demolishers and canons dodge my attacks, seriously?:D
imagine canon or tank that dodge your attack like bruce lee