Your sysctl.conf has a broken line:
"sysctl -w minfree=4096,8192,16384,32768,49152,65536"
is listed as:
sysctl -w minfree
Actually your whole sysctl.conf is rather broken. Entries in sysctl.conf should be displayed as:
# favor block cache
vm.dirty_ratio = 90
vm.dirty_background_ratio = 70
Instead you have them as "sysctl -w xxxxxxx=xxxx" which is how you'd type it if you wanted to run the line on the command line...some of your lines when ran manually indicate the value being set isn't valid....i.e. Unknown Key.
If you still want to run this, although it's obvious it didn't get thoroughly tested (how could it when the sysctl is invalid and the "set_touchscreen", "read_ahead_kb" and "minfree" lines are all invalid anyway....so no improved touchscreen or improved memory management) you can fix this by moving the /etc/sysctl.conf to /etc/init.d and overwriting the 06sysctl file...you will also need to fix the broken line mentioned above (or not since minfree is one of the three invalid lines)
Now workarounds..the minfree line posted is in the free app "Kernel Adiutor" under "Very Aggressive" and will set it on boot along with many other features It's a very useful app. The free app "trimmer" will allow you to schedule weekly fstrim's of data and cache...it allows system as well but really you shouldn't have to trim system as it's normally read only.