Full-Screen Auto-Location Change in OS X 10.10
I've never found any way to get full-screen apps to go to the left. At least they don't drop randomly in the middle of other Desktops like they used to, so at least you now know where they're going to be.

My workaround has been to use the default ctrl/number key commands in System Prefs > Keyboard > Shortcuts > Mission Control, as below, which in my case makes the first full-screen app accessible by  Ctrl ⌃   6  then  Ctrl ⌃   →  or one swipe.