Could be. Or, the attack on the Consulate was designed to lead the attackers (following the escaping Americans from the Consulate) back to the (supposedly secret location) Annex.
Note that the attackers did not hit the Annex quickly after they hit the Consulate: It took them until after all the Americans had reached the Annex to begin the attack on the Annex.
Um, then what do the planned ambush points show, since these ambush points were in place before the returning Americans?