The Robot blasts two holes into the metallic box. But there is only one whole visible when Dr. Smith bends down to inspect the contents of the box.
During the descent in the pod the film has been flipped to match the right-to-left direction of the shot of the pod. The stripes on the arms of John's and Don's shirts and their sidearms are on the wrong side. Confirmed when they land and exit the pod when they shift back to normal right side hand side.
The footage of the alien motorcycle ships leaving was just one ship and did not resemble the "cycle ships" in any way. In fact, it was the same footage used for the space pirate A. P. Tucker's ship and several others some time earlier.
The brand name "Kent" was visible on the hippie alien girl's guitar.