We have implemented a change in our breeding guidelines. Trainers will no longer be able to breed a horse, retire it and then utilize the same name. This practice was causing the conflicting birth speed ratings that were recently seen by certain players who bred a horse initially, sent the horse to their desktop client extension, immediately retired the horse and then used the same name for a new breeding.
When we upgrade the desktop client, we will be able to make some modifications in the client that will allow us to avoid this issue in the future. At that time, this ability will hopefully be reinstated.