Yes, it's current/max. But the fact that there are zeroes in the left side means that there's a thousands digit there too. In chapter 10 when he appraised the prince it showed "9/40", not "009/040".
1003/1006 is more likely. His scan won't show the zeroes in the tens and hundreds digit if there isn't a thousands digit.
Heck, the author might go with 9003/9006 for the old dragon ball meme.
You have a point, but I think they're just happy that it's something different for once. After all, people seems to have grown tired of seeing an isekai MC buying/getting a slave.