Is this normal?

[Big EZ]

I have been fooling around with a new method and I have a question for the math guys.......

Am I experiencing an advantage or are these results typical???

I use a 2 spin series for betting. The only results that can come from 2 spins are
W on first bet, series won start over
L W  win on second bet, series won start over
L L  lost the series

I have tested about 1k series and I am producing a strike of over 60% for winning series.

Is this typical or a percentage to be expected? Or am I showing an advantage?
Any insight into the math behind this would be appreciated. If I did not do a good job explaining please let me know and I will try again