Ability: Glitch Free
Can be Natrual Cure or Serene Grace.
Moveset: Glitch Free
TM 38, 29, 26 and Softboiled can be learned by Blissey.
Sp. Attack: Glitch Free
Can be between 139 to 273
Sp. Defence: Glitch Free
Can be between 247 to 405.
To explain the colour shades, The blue indicates that Blisseys IV makes worse increases in Attack by Level Up. Same with the red, exept in means a stronger increase.
So the final answer is no, your Blissey is perfectly fine.