Article 63, letter j), of Law No. 18,695, provides that the mayor has, among other powers, the power to "delegate the exercise of part of his exclusive powers to officials under his authority or to the delegates he designates, except those contemplated in letters c) and d). Likewise, you may delegate the power to sign, under the formula 'by order of the mayor', on specific matters." In this regard, it is worth remembering that according to what is prescribed in letters c) and d) of the cited article, the exclusive powers of the mayor are: to appoint, remove and apply disciplinary measures to the officials of his office, in accordance with the statutory norms that the rule. In this context, the Mayor of La Cisterna ordered a delegation of the power to sign "by order of the mayor" to the municipal secretary, ordering that the latter sign by his order "in everything related to the financial administration of the municipal clinics", later ending due to service needs, two contracts with personnel at the offices' fees and ending cleaning contracts with external personnel. Analyze, what problems are evident in said documents signed "by order of the mayor"?