What are these?

[robgray]

Lavender requires two copies of the recessive lavender gene in order for the color to show. If you breed lavender to something else, you'll get a black chicken that carries a recessive lavender gene. This is described as being "split" for lavender. If you take two chickens that are split for lavender and breed them together, only 25% will show the lavender color. 

If you were sold lavender orpington hatching eggs, you should have hatched lavender orps. The rules of blue/ black/ splash breeding do not apply. Lavender crossed with lavender will only give you lavender chicks. This is why lavender is also sometimes referred to as "self blue". Unless the breeder specified that you could get some that were just split for lavender, you definitely did not get what you paid for. This chick is definitely not the result of breeding a lavender orpington with another lavender orpington. 

Yes you are correct. I was sold pure lavender orps so they should have bred true and be lavender. One looks brown.
Thanks so much for everyones input