Health, Hunger, and Sanity Glitched at 100%.

This sounds like a mod issue revolving around poor handling of networked variables or a conflict between them.

Should a mod fail to properly use these networked variables you may experience all sorts of invalid things showing like having all the recipes unlocked, the badges having full stats, etc.

I'd consider disabling mods one by one to see the root problem if you don't mind the repeated reloads and want to keep some of the mods you're using.

I want to report that similar bugs have been experienced by several members of my group when joining as clients whenever Balloon Tweaks was on. The OP should first submit a log of their full mod setup, then start disabling them one by one.

As said above, please attach a log file. Also test without using any mods, client and server side.

@Arlesienne Feel free to bring this to the author of Balloon Tweaks.