Это скорее всего связано с переносами.
Подробнее см.
CUS STANDARD TEMPLATE:
If one or more of these types of templates under this note are transported from a source system into a target system, all the templates found under this node in the target system are overwritten.
For the templates that are not on the transport request, two options are possible:
* Other templates that may already exist in the target system remain unchanged.
* Other templates that may already exist in the target system are deleted.
For ALV templates, only the second variant is supported: In the target system, all templates that are not on the request are deleted.