yep, seems to happen with most of my pets that I'm training too.
Just came to post this here as well. It's been happening for about 2 - 3 days for me, but I wanted to make sure I wasn't clicking something wrong. Now I double checked: My pet had 1971 Speed, the session gave me 2 Speed, I clicked the back button the training centre provided, and it showed me again I had 1971 Speed, with the option to train Speed. I got: Oh No! You cannot train a stat more than 2.5 times your level! After which I clicked the "back to last page" button, and then it correctly showed my 1973 Speed and the option to train Level.
I have had that happen repeatedly, too.
Let me know if the training has been fixed. Just pushed out a code that should round down the multiplier which might be accounting for the error