You should be perfectly fine since the costumes didn't win an award. It's only frowned upon when you've won a major award before with the same costume, especially if you go from entering it the second time at a smaller convention than the one you previously won at.
2014 - Upcoming Conventions :
Holiday Matsuri (FL)
Upcoming costumes : Suzie Q from JoJo's Bizarre Adventure, Edea Lee (various versions) from Bravely Default, Robotnik (genderbend) from Sonic, and more!