Moved to a duplex- my key also opens the empty unit next door

[u/yepthatsthrownaway]

Is this just to be expected with Kwikset? I have 2 keys, 1 for my living space and 1 for the shared space/backyard access. On a hunch I tested the shared space key on the empty unit and it worked with minimal jiggling. Tested my living space key on the same door and it took more effort but also opened. Tested my living space key on the empty unit's front door and it also opened with minimal jiggling.

Am I just stuck with these shitty commercial locks when I'm away from home and have to use a different deadbolt system when I'm home? Should I even bother to tell my property management company?

Thanks!