Iraq was able to "complete" its invasion and decapitation of military command & control in two days because the Kuwaitis were massively under prepared. After that you then need to consolidate your position and that would be days if not weeks of deploying troops and their equipment deeper into the country.

So after seven months of occupation there's probably a heap of logistics required to extricate and decamp your forces & equipment that likely isn't going to happen even in 10-15 days.

It probably took them longer to prepare than just 2 days.