Is Satan bound in the Month of Ramadan?

The Prophet said:

إذا جاء رمضان فتحت أبواب الجنة وغلقت أبواب النار وصفدت الشياطين

"When Ramadan comes, then the doors of heaven are opened, the doors of hell and the shack are shackled." (Narrated by Muslim No. 1079)

Saying Al-Qurthubi, then when asked: "Why do we still see a lot of evil and disobedience occurred in the month of Ramadan, but if indeed the demons have been handcuffed, surely it will not happen?

The answer: Verily the disobedience is only reduced from those who fast when the fasting exercise to observe the conditions of fasting and keep adab-adabnya.

Or it could mean that the shackles are only a part of Satan, that is, the demonic authorities are not entirely, as already mentioned in some narrations.

Or it could also mean the reduction of crimes in the month of Ramadan, and this is in accordance with what was witnessed, that the occurrence of disobedience in the month of Ramadan is fewer than the other month, because the devilishness of all demons can not ensure crime and disobedience disappear altogether, and immorality is also due to many causes other than demons, such as bad souls, bad habits and temptations of demons in the form of humans