Visible crew/equipment: When Call spills Jona's 'battery acid' drink, she throws the boxing gloves on the table. When she does, they bump the camera. (00:28:15)
Visible crew/equipment: After Ron Perlman has uttered the line "f***ing waste of ammo" in the clone room there is a shot that starts at ground level and rises up. You can see a ray of light heading towards the left of the picture being obliterated by the camera's shadow as it rises.
Visible crew/equipment: When the android is connecting to the ship, in a lot of close ups what looks like a stage lamp is reflected in her eyes. There wasn't anything in the room that looked like that.
Chosen answer: Well firstly the queen was probably genetically engineered, like Ripley herself. A few days might be all the time they need to have a fully grown queen created. Secondly the 8 incubated victims were only the latest batch, they had been incubating people with xenomorphs for quite a time I suspect.
lionhead
With regards to the quick growth of the alien queen, it is standard for the xenomorph in nearly every film they appear (Aliens is the only exception, the only chestburster shown in the film is quickly killed by Apone) to grow to full size in around one day. Presumably the same is true for the queen.
BaconIsMyBFF