||04-07-2011 09:03 PM
It's because some of the pieces are unlocked through multiple methods. You don't have to pay for the same piece multiple times.
For example, if someone purchased the TNG Series uniform, that unlocks the TNG Series badge for that uniform. Purchasing the Counselor's uniform also unlocks the TNG Series badge. Either method works independently, but they both give the same result (with the badge).
A more obvious case is the Enterprise pants. The pants are unlocked via the Enterprise Bundle, the Enterprise Uniform, or the Mirror Universe Enterprise Uniform.
You may ask "why would anyone buy the uniform sets without the bundle?" Because the uniform packs came out first, and Cryptic created the bundle (that included the uniform sets) later on. Those who already had one or two would obviously not want to purchase the whole bundle, since that would be a waste.