Then I'd say there isn't something to fix. Some people were saying that one could push the lock bar over on the ZT0801, due to the steel insert engaging with the steel tang. No one mentioned their lock-up, just that one could push the bar over. That's not really an issue, even if you grip the knife hard enough during use to move it over. If the lock up isn't at risk of causing disengagement, I wouldn't worry about it.
As for the detent, if it retains under normal movement and carry, it's probably fine too. I remember when the SR-1 came out, a lot of folks were complaining about how strong the detent was. Personally, I don't really care either way, so long as it retains and can be opened reasonably easily. My SR-2A has a slightly weaker detent than I expected, but I can't shake it out of the handle so it doesn't bother me. It's been in my pocket for the last couple of weeks nonstop, hasn't given me issue there either.
It's probably ok.