I've encountered a problem where bleed debuff is shown on the monster in purple, just like poison debuff. It's a graphical glitch, the mechanics is correct. It happens only when Ranger's skill in poison is higher than in bleed (apparently).
System: Windows 7 64-bit
Description: It happens on different maps. My ranger has 8 poison and 1 bleed. When she puts bleed on someone, it depicts in purple, just as poison. Monster information, however, shows correctly what it really is, and if a monster is both under bleed and poison, both debuffs will be purple. See the screenshots below. When I re-skilled the same Ranger to 1 poison 8 bleed, the glitch disappeared, everything was depicted correctly. When I switched back to 8 poison 1 bleed, same thing again.