Should I be worried about the security alarm going off at work?

I work for a commercial cleaning company, and I clean the dmv that requires disarming the security alarm when I arrive and arming it when I leave. When I arm it it counts down from 60, and I have to get out the door before it counts down. Something weird happened today. When I disarmed it, it gave me a weird code, and said "trouble". I called the alarm company, and they said to reset it. So I did that, and it said "ready" and that's what it's supposed to say. But when I leave it for a while, it shows the code again, but it goes back to normal when I reset it. So when I left I armed the alarm. It counted down from 60 like usual, and then I went outside. I waited a minute and went back in and the alarm went off like it's supposed to so I disarmed it, and armed it again and went outside, so im pretty sure I did it right. I explained it to my boss and she said I did it right. I'm just afraid that someone is gonna break in and the alarm won't go off and they'll steal everything.

Should I be worried about the security alarm going off at work?
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