Answer
The Product Property was misused.
Work Step by Step
We need to correct the use of the Product Property: $\log_216=\log_2(4·4)=\log_24+\log_24=\log_22^2+\log_22^2=2+2=4$
But we should have: $\log_28=\log_2(2·4)=\log_22+\log_24=\log_22+\log_2^2=1+2=3$
We should have used the Power Property as follows:
$\log_28=\log_22^3=3\log_22=3(1)=3$
