Inconsistencies in Qana Attack

Just found this article on YNetNews.com interviewing Brigadier General Amir Eshel (head of the IAF). He pointed out several facts that create possible inconsistencies in the attack in Qana that lead to the death of more than 60 civilians.
So far the story has been that the building was attacked by the IAF, and that that attack lead to the collapse of the building while civilians were inside.

General Eshel says that the attack by the IAF occurred around midnight, but the building didn't collapse for another 8 hours. The general floats a couple of possibilities:
1. The collapse was the result of explosives being stored inside the building that detonated several hours later. (Detonation could be as a result of air strike, or as a result of Hezbollah wanting press coverage of an event that could be blamed on the Israelis. The part in parenthesis is my own theory, not the general's).
2. The IAF attack in the area around midnight damaged the building but didn't immediately cause the collapse. The building eventually succumbed to structural damage from the IAF attack 8 hours later.

In order to prove or disprove any of these theories several questions must be answered:
1. Did the IAF actually hit this building, or did it hit a target on the ground around the building?
2. Were explosives or other munitions being stored by Hezbollah in the building?
3. Was there an explosion at the time of the collapse of the building (8 hours after the IAF air strike)?
4. If there was an explosion at the time of the collapse of the building (8 hours after the IAF air strike), was it the result of explosives being stored inside the building?
5. If there were explosives stored inside the building, were the detonated as a result of the IAF air strike, or the result of a Hezbollah attempt to blame a tradgedy on the Israelis?

Tags: Hamas, Hezbollah, Israel, Lebanon, Middle East, Palestine, Qana, Terrorism, United Nations, War