background apps closing automatically

hi all! İts my frist thread i have some troubles whit my s3 multi tasking when i press home button after 5-6 sc apps restarts it self i dont get it. İt have multiwindow but its not enough simple homebutton multi tasking is more importent when i close the screen or background the navigation app it stops giving me directions couz its closed help me please i found some people having this problem but i coudnt find any solutions

these are my settings

limit background option standard

limit background activities not selected