Thanks for the review.
It was a simple mistake on our behalf that has only happened once, you got the wrong instruction sheet. It was corrected very quickly. The apartment complex is very secure and the gate is never left open, it is actually impossible for the main gates to be left open as it works on an automatic sensor, once you use the fob to enter the gate opens and automatically closes within under a minute. It is a highly secure complex. There was no need to worry about anyone going into your apartment, as stated, this was a simple mistake on our behalf. Mistakes happen in life and this one was not a major mistake, it was corrected straight away and no issues occurred from it.