This is intended.... minus the bug you found. It is always when harmony is exactly 50 that it breaks. I will get this fixed in the next hotfix.
as for the insane costs this is VERY VERY much intended. I can't spoil it to much outside the discord..... but I have an idea in place to AFFORD those crazy amounts. I mean.... you would have to be stuck as a cock for an entire year to afford that! *hint hint*