Grammar

Hello, I have questions related to the grammar in the following passage.

If you answer my questions, I thank you for answering.

At the Leipzig Zoo in Germany, 34 zoo chimpanzees and orangutans participating in a study were each individually tested in a room, where they were put in front of two boxes. An experimenter would place an object inside one box and leave the room. Another experimenter would enter the room, move the object into the other box and exit. When the first experimenter returned and tried retrieving the object from the first box, the great ape would help the experimenter open the second box, which it knew the object had been transferred to. However, most apes in the study did not help the first experimenter open the second box if the first experimenter was still in the room to see the second experimenter move the item. The findings show the great apes understood when the first experimenter still thought the item was where he or she last left it.

Q1) In the above passage, do you think the 'in which' instead of 'where' is grammatically correct?

Q2) In the above passage, do you think the 'moved' instead of 'move' is grammatically correct?

Please reply.