.... vague descriptions. When selling "hets", the seller usually gives odds that the offspring are really het. An amel to normal pairing, like yours, would be 100%, of course. Het to het breeding would produce some normal looking offspring that have a 66% chance of being het, het to normal would produce 50% hets... I'm sure you know all of this, but others reading this post may not.
When you say that this pairing was bred 4 times back into your thayeri line, one might assume that you outcrossed to a normal, pure thayeri each time, producing the math I did. Now, that seems not to be the case. You bred amel to normal, and made hets. Then you bred the hets together and produced a few amels and some 66% hets. You took one of the amels from that pairing and bred back to pure thayeri again to make hets "and so on, and so on" as you say. Since you are only breeding to pure thayeri only every other generation, it would take 8 generations to breed back to pure thayeri 4 times. 8 generations would be around 20 years of work. OR you didn't breed back to pure thayeri 4 times. If you skipped the step of breeding back to pure thayeri every other generation, then your claim of breeding back into your thayeri line 4 times is confusing. Did you mean your line of amels, that are not pure thayeri? Anyhow, I am alot less confused by genetics than by your descriptions. I'm not saying you are purposely trying to deceive anyone, just saying that,in my opinion, you aren't being specific enough. If your ad said 100% hets, I would know that it was a pairing of an amel to a normal. Through vague descriptions, one could make alot of incorrect assumptions.
Greg