Help me make sense of this

I’ve gone into the device information to change the time from military to GMT Eastern time yesterday today I go in to follow up and see if the information has remained to Eastern of course it’s not and the app keeps

Military time return and the app under default keeps Disappearing why

Im having nothing but troubles with this door lock, about 2 seconds away ,on posting this shit all over FB,YouTube, TruthSocial Mewe ,Parler Twitter Etc the trash that this lock ix