Cam shaft and Crank Shaft Notches not lining up - 2012 Prius

Hi all!
My husband is repairing the head gasket on my sons 2012 Prius. He did this same repair on my 2010 Prius.
When he put the timing chain on my 2010 Prius, the Cam shaft and crank shaft notches all lined up perfectly. This time, they are not lining up. Is it normal for them to not be lined up? Was it coincidence that they were lined up when he did my Prius?

Also, does the 2012 Prius use a "hunting" timing system? (we've read about this).

My husband doesn't know if he should manually adjust the cam and crank shaft so they line up, or something else?

Any experiences and solutions would be greatly appreciated. He has to have this repair done by Saturday