Stuck in TRWP topic

I went back to my backup and it was fine but then my phone said something about an update and I did it. While the phone was rebooting it went back to TWRP. No matter what do it always goes back to TWRP. I even wipe ans restore and still nothing. There's a little picture in between the home button and the back button and when I touch it it says "updating partition details.......full SELinux support is present" I dont know what this means. Can somebody help me?