Matrix row sums up to more than one Markov transition matrix

Question

Data 1:

import numpy as np
import pandas as pd


arr = np.array([0, 1, 2, 3, 4, 6, 7, 5])
x = pd.Series([0,1,2,3,4,6,7,0,1,2,3,4,6,7,0,1,2,3,4,6,7,0,1,2,3,4,5,7,0