See for yourselves:

Note that I have the client provided by Feenix. Yes, I am aware that they are not 100% compatible, and I have followed the instructions in the Getting Started thread, meaning that I replaced the Feenix WoW.exe with the one provided in the link, following by the replacement of the .wtf file of course.
I rolled the exact same character on Feenix to see what the hell was going on. It turns out that on Feenix a level 2 dwarf paladin has 110 HP, while on this server he has 108. Which would explain why I got the -2 HP message.
Anyone know what's going on?