This is because of a function we called Airframe Nicknames. We maintain a list of nicknames. For example, Lockheed Martin C-130 is called Hercules, while C-130J is called Super Hercules. The program append the nickname to it's model automatically when one found and NOT present in the model.
Using your example, 02-8155 has model "C-130J Hercules" (which is wrong). The program find a match nickname called "Super Hercules", which is NOT in the model, so it append the nickname to the model, resulting "C-130J Hercules Super Hercules".
Simple change the model to C-130J should solve the problem. The nickname function is intruduced to reduce confusion and confliction of variations between pure model and model+nickname. When you enter a new airframe, you do not need to enter a nickname. That's why under "Model" input field, there's a note read "Do not enter airframe nickname, i.e., for F-15D Eagle, enter F-15D only. ".
Hope I explained it clearly.
Thanks,
Ken