I open minecraft to be on my world that has real Monopoly, and this is the 3rd time this has happened, but Whenever I have a world with a lot of command blocks the world just disapears,but is working Tuesday, and gone Wednesday, I did not delete that world, I am POSITIVE, but this is also the 3rd time, the other two had a lot of command blocks, I asked my parents, I checked some stuff out, but the weirdest thing is that it is still in the saves folder!?!, I have taken it out and put it back in, doesn't work, I thought 1.8.5,6, or 7 would have fixed it, but pls fix this before 1.9 pls.
This started in Minecraft 1.8.4 in a world called Realms: Non Mods (this was a single player world, not realms) I had 3 non mods on there, (I didn't know how to dounload mods, so I used command block) they were Lucky blocks No Ores and Ender Game The lucky blocks had roughly 40-60 command blocks. The No Ores had roughly 10 command blocks. And the Enders game had around 4 command blocks. Nearly 80 command blocks, the last time I was on that world was when I was playing with snowmen,Dragon,Wither,and Golem spawn eggs, I put the spawn eggs is the mob spawner where they started appearing , I turned the mob destruction thing off, and the next day, the world was gone, but in the saves folder
The next world was called Realms Redstone, it had probably 100- 150 command blocks, same thing happened, and finally today, my world called Realms Games was taken out , not by deletion, but even weirder was there was practicly 3 command blocks in the whole thing, my only idea was that before, like 3 days ago, I tested out the command /summon Sheep ~ ~10 ~

of course I also did that with a pig, I was planning to us them as game prices, but I decided to test armor stands, with arms, and invisible, I think in the 8.7 update, they removed that ability, but I didn't know, so I tried that out, but the world is gone!!!, pls fix asap, maybe in 1.8.8
Thank you for reading, if you have finished yet (I have not deleted any of those world's, those were the best worlds I have ever had, PLS GET THEM BACK) I am a serious redstoner, I may as well just quit, otherwise pls fix.:'(

Try putting 100 command blocks and have commands in them, all going on in a Redstone clock