Exterior Side Trim Clip - All Questions

I have the 1986 VW golf GTI Convertible this has a single trim strip would say has a deep waist line strip with the chrome insert. ? The strip just pushes on to the clip. However I do not understand why it has two projecting peg's. OK One to locate on the body work. so it can be located BUT Why is there two. There are FIVE Clips for this stirp OK.I Do not want to get the wrong clip. I will need at least 5 clips Poss some more just in case. Thank you I do hope you can help me. Thank You