I had to laugh when I read your post, I'm not laughing at you, I'm laughing at the lack of attention that companies take when they produce new products now-a-days. Its like "get this piece of #@*$% out the door, now lets work on the next."
You didn't even mention the best part, how their stupid "Users Guide" doesn't even bother to tell you how to pair the lock with a controller.
Anyway, the ability to manage the lock "through a network controller" was a figment of someone's imagination. Maybe the "User's Guide" author, likely based in China, thought that this would be a cool feature.
I reread the "Users Guide" and I see the line "Deleting a code can only be done from the system controller" so that would imply you might be screwed. Keep in mind, in theory, this lock can store 30 codes so you may be really screwed.
I would try taking out the batteries, press the programming button a few times, and letting it sit for a bit. I can swear that it looses all the codes when you do that, which is another problem, but lets not split hairs. What do you want for a lock that only costs $250, you expect it to work for that low a price?
The manual says to check regularly for new unauthorized access codes. So I'm supposed to check for new codes every time a visitor leaves my house? Pretty impractical, and perhaps not even possible.
Yeah, maybe they expect that after your cleaned up from the party, you will go outside and test every code. I guess were back to the day-dreaming guy in China again.
Also, you might try something longer than 4 digits. Since it has multiple numbers on each button, that increases the odds someone will guess your code. I'd stick to 5 digit numbers or more.