Questão jurídica principal
Whether the cantonal court improperly expanded the dispute to three invoices not covered by the objection decision.
Decisão extraída
The cantonal court exceeded the object of the dispute by expressly including those invoices without proper procedural basis.
Fundamentação extraída
Administrative judicial review is limited to matters previously decided by the administration; extension beyond the contested object requires a common factual basis, a prior administrative statement, and respect for the parties' procedural rights, which were absent here.