Today i tryed to Rebirth with my champ. Put my skills on, stats. Then i clicked on rebirth angel 3 and on rebirth. Again i put my stats and skills on + my equipment. I got 16k Hp 55k max attack 27k Defense 185 PR Then i teleport back to argent and the stats are all reduced just after the teleport. After i teleport i got only 12k HP 27k max attack 17k def and 158 RP. Attack is reduced over 20k- ! and def 10k-! I tryed to rebirth on 2 chars so its not char buged.
Try re-logging your character. Moreover, since it was only rb2, we can suppose it doesn't really affect your status since you still have the 3rd rb stone to use. Consider also that after rebirth, upon equipping all your items, your status will also be affected by the effectiveness of your equipment.
1st. Try to re-log. 2nd. Try resetting your stats on Class Changer NPC (cost you 25x million dollar note). it adds 500 stats, unlike to your original stats of 473.