There is no such thing as total air and land control - in any war, anyplace. The clear evidence that it is not the case here is that rockets are still hitting Israel.The IDF have total air coverage in Lebanese South and total land control 5km< and air control 30km> inside lebanon.
You have to consider 2 facts:
- the terrain in the area: clean hilltops (with villages) and valleys full of thick brush, trees and with lots of natural cavities and caves
-Hezbollah isn't moving much, they have lots of ammo and small teams hidden in the mentioned geographical features (where you can easily camouflage a Fajr-3/5 launcher and ammo. Remember that for launching their weapon of choice (122mm BM-21 Grad - wrongly called Katiusa in the West even if Katiusa isn't in service any more since the 50's-60's) they don't use a big Kamaz 6x6 truck with 40 tubes, but rather smaller instalations - usually 6 tubes on a fixed tripod or a jeep. That might also be the case with bigger rockets.