Pyramiding is caused by a lack of humidity.
See http://www.tortoiseforum.org/threads/the-end-of-pyramiding.15137/
See http://www.tortoiseforum.org/threads/the-end-of-pyramiding.15137/
Also - they are SUPER CUTE!!!! Congratulations
Kieran, you've been getting very good advice in this thread, but you seem to be ignoring a lot f it.
We know that you want two tortoises and you want it to be okay. It isn't okay. They don't get along, its not sweet when one is trying to crowd the other out of the territory, and they need to be separated, before one or both get sick and die. Groups can sometimes work. Pairs do not work.
Also, these tortoise have been kept too dry and that is why they are pyramiding. The breeder you've been talking to s using old, out-dated, incorrect info, and the proof is in the pudding, so to speak. Look at the results he/she is producing. Of course the breeder is telling you that a pair is fine. They need to sell and get rid of the babies. We stand to gain nothing by telling you to separate them. In fact, we risk upsetting you and having you leave our forum, to the detriment of your tortoises. We don't want you to get upset and leave, but you aren't hearing what is being said here. Making a sale and doubling our money is not our goal here. Our goal is purely to help your tortoises live a healthy life and to help you have a good experience keeping them. If you continue on your current path, you will learn all the things we are trying to tell you, but your tortoises and you will suffer the consequences that some of our tortoises suffered in the past as we learned these things the hard way. You don't have to learn these things the hard way and your tortoises don't have to suffer the consequences of the breeder's ignorance.
Pine oils are not good for tortoises. Pine pellets absorb moisture and make conditions that are too dry and desiccating for small tortoises. They should not be used.
It is common in the UK for people to recommend and sell tiny little cute enclosures like yours. They are too small. Tortoises need room to move around. Locomotion helps keep things moving in their long GI tracts, and it keeps them fit. Myriad health problems can occur when they are crowded into small enclosures. The enclosure you have now is barely big enough for one small baby. It is not nearly big enough for more than one and it will certainly not be big enough one year from now, much less several years from now.
We are trying to steer you away from irreparable damage and health problems. Please let us. Also, feel free to question all of this and ask for more explanation or proof. We are happy to back up these assertions, and doing so will help you and others learn more.