Test 2,some questions same as test 1?

Hi,ive just looked at the second test,and noticed that some questions are exactly the same as in test 1,is this a website error or why would they be the same?

Hi! Yes, there are many same questions in the exams… I just approved my third written exam and I’m studying for the practical exam and first I have to get RI liquid for the refractometer… Good luck to you in your exams… With kind regards, Tomi