Execute Bug 16w07a

#Hey I think I found a bug about execute I dont sure is it only error on my map or entire execute may be I dont know what change in 16w07a sorry
you can delete this post if it illegal or something i dont know

In 16w07a or up The execute command wont work in my map

Example if you create drop way like this [In the first picture]

And then you make execute command It wont work and detect player while they falling
The last version that it work is 16w06a
This effect in Pre1-2 too

[I already use repeat commandblock]
[I already test on another randonTickSpeed]

Only way It will work is fly from a floor to above
or press space while using elytra

Oh I want to ask another too

In this map the tellraw command for protect map from cheating that is :

execute @a[score_AllowG3=0,score_AllowG3_min=0,m=3] ~ ~ ~ /tellraw @p [{"text":"[","color":"white"},{"text":"Anticheat","color":"red"},{"text":"]","color":"white"},{"text":" Sorry you can't change gamemode and             Do not Cheat! you will be watching by us security.","color":"red"}]

are not working
with gamemode 0,1,2 It work properly

Sorry If My grammar wrong or I dont know about command block update

Here is my map link : https://www.mediafire.com/?ryhhuss1qewbjii

[No VIRUS 100% sure I already scan it with eset nod32 before zip]

Anyway If you want to test in my map please type this command first
/scoreboard players set <player> AllowG<number of gamemode> 1
Example : /scoreboard players set Player AllowG1 1 - for Creative mode permission