My WordPress 4.6.1 HELP with bug “cheatin huh”

[ Moderator note: title adjusted, please refrain from using help, urgent, emergency, asap, etc. in topic titles. ]

I just build my own site FreeBird Safety Services cause I can’t afford somebody to do it for me. I am a rookie at this. Every time I trey and customise my site that “cheatin huh” message come up. it has already changed my site. sidebar is gone, and the font changed. I need serious help. using the vantage them. im about ready to rip it apart and start from scratch. What can I do. if a solution exists, tell it to me like your instruction a 5 year old