Appying Exchange Roll Up

I applied Exchange 2013 Sp3 Roll UP 6 to one of my servers, but when check the installed roll ups I can see that roll up 3 is still seen installed as well, but before when I used to install roll ups, the old one was deleted automatically. So could this be a problem or I have to uninstall the previous roll up manually. Here is how it looks now when I run Get-Exchangeserverrollup command