Are these coffin plots?
If so it must be stacked plots. Possibly only 2 spots where they stack 2 on top of each other with a total of 4. Or it is 3 spots with a total of 6.
Sometimes people just buy the plots that sit on each side of the main plot because they don't want strangers being buried on either side of them.
Wasn't Daniel cremated? - If so then these are small plots just for urns to be buried in the ground. You can buy one large plot that will hold several urns.
I don't know if Daniel was cremated, but I heard a couple of days ago HKS planned to cremate ANS... of course, now we have her DNA, but still it precludes digging her back up later, if another drug was to be considered not found right now (like that politician in Nevada who was murdered by her nurse husband (allegedly) and he had killed her first husband with the same drug. They dug the husband up and found out, yep... he had the same drug in his tissues after all.
I saw a Bahamian guy on Fox the other night and he said that there were two plots purchased. Each capable of burying two people and said she bought them for herself, HKS, Daniel and the baby. We have cemetery plots in Boerne Texas where our son is buried and you can bury two people in caskets there (one on top of the other).