Yes, it is normal, as you can see in my screenshot below...
It just shows that your phone is receiving WiFi and 3G, which means that if you were to lose your WiFi connection (move out of range), your phone would ' fall back' to the available 3G connection.
Additionally, when I am in 4G LTE coverage are, and on WiFi (like at the office), I see both the WiFi icon, and the Sprint Spark LTE icon in the notification bar.