Door got unlocked and opened twice after reporting to landlord

(B.C- Canada🇨🇦)

So as the body title says, I was home scrolling on Reddit and heard my door open just very slightly, I just ignored it (I know I wish I didn’t) because I thought it was upstairs and when I went to check my other room 10 minutes later I noticed the door that separates my landlords property from mine unlocked and open (I have an attached basement in the house) it has a key facing my side which I don’t even own. I immediately informed my landlord & she apologized saying she wasn’t home & will lock it as soon as she gets back. Maybe 20-30 minutes later they locked it.

not even 24 hours later… the door is unlocked/open again.

I placed a pole on the door to stop it & security cameras so if the pole falls I will have evidence.

I want to give her the benefit of the doubt, maybe my landlord has a baby nephew that’s curious or even an older relative that doesn’t know I rent, maybe she wants me to move? I always pay my rent early & rarely have people over & I don’t party.

Any suggestions if the pole falls? I plan to move in 6 months as for I’m saving money monthly.

I also find it creepy the door is unlocked again shortly after locking it and they never cared to check if it got unlocked again?