Well I do not see any reason to worry too much.
The basic reasons why we either remove side shoots on some tomatoes and leave them on others is to produce a good crop. Regardless of the official designation of cordon or bush it is better to remove them if they are just producing a lot of flower free vegetative growth. If the side shoots are carrying lots of flowers probably better to leave them.
That said, you have to strike a balance between the number and the size. Leave every side shoot and you could end up with thousands of pea sized fruits. Also the season does not last forever, and the later flowers set the less chance of ripening before the weather deteriorates. So I remove more as the season progresses.
In short, don't worry about strict rules just trust your judgement.
Purely by coincidence, I picked my first ripe Sungold today. Just the one - but it is a start!
They really are delicious.