Can this be my fault?

[sorter]

The bottom edge is complete yet much less wide than the incomplete top edge. I doubt I lost any pieces. I'm missing several edge pieces.

[JedMedGrey]

Some puzzles are cut so that it can be difficult to determine which ones actually fit together. Look at your picture - the sun should be further to the left, so I would guess that several of your top left edge pieces need to be moved to the right of the sun. That should get you back on track. Have fun!

[sorter]

Well, I figured there could be duplicate cuts but not in a way that would allow that many pieces to be wrong.
I see there are 20 pieces on the bottom edge and 20 on the top so that supports what you are saying.
I packed it up and opened a different puzzle. Maybe I'll get back to it someday.
Thanks for your help.

[JedMedGrey]

I have seen puzzles where every piece has essentially the same cut. Not my idea of fun.

[heidenmaverick]

I've encountered puzzles where the cuts on the pieces are nearly identical. Not how I define fun.

mini crossword

[terbugerta]

I've seen puzzles with roughly the same cut.