Yes.
I wouldn't worry about it, though.
The only issue that could arise is that the correct device driver isn't chosen when the sensor is paired. The model / manufacturer data isn't used in any other ways for the door/window contact sensors or the leak sensors.
I believe what happens is that during the pairing process the value telling the hub the length the model text string is missed somehow, so extra "garbage" characters are picked up as part of the model name.
As other have suggested, you could try repairing the sensor if the "garbage" characters really really bother you, but nothing is "broken". The devices for the above screenshots have been connected and working just fine with my hub for over 8 months now.
