?2000? Dime How Did This Happen

The red color on the edge is the same thickness on all dimes. The differences? The Red color longer denotes the direction the blank was cut off the stock material. Thus the wider copper band is towards the bottom of the cut. When struck in collar, it makes the red look longer because of the smearing cut of the blank.
On the last image. The left coin was cut from the reverse side. The other coin was Cut from the obverse side. They just got flipped in direction because of the setup process and the flipping over of the blanks/planchets before the Strike. Just a normal event, but know why they are different is in your searching technique. Now you know why this happens.

CoopHome: Why do the copper colors look different on the edges of clad coins?

Not true, the side that the copper falls on is random. I cannot see a way that the mint can control the orientation of the copper.
I dipped into my bag of dimes and grabbed a few dime to check before posting my response.

I never studies this. I think Dear is right it is random. Must be the band and the bins the blank fall and then are drive to the press, so could be different side. It is suppose to be what COOP say but one reason of other infirm this.