Session Translation and the Reques-uri and To fields

Hello everyone.

I have configured a set of translation rules to replace special characters in the called number, however, for some cases  the translation rule only modify the request-uri while for the others the translations modify reques-uri and to fields. All translation rules are in the same session-translation, so, I couldn't identify the reason of this behavior, Someone has seen this case before? is normal?

Following is an example of the configuration:

translation-rules

        id                                           translation_1

        type                                         replace

        add-string                              34003000

        add-index                               0

        delete-string                          1386

        delete-index                            0

translation-rules

        id                                      translation_2

        type                                    replace

        add-string                              42020011

        add-index                               0

        delete-string                           1391

        delete-index                            0

session-translation

        id                                     Mobile_Business

        rules-calling                          

        rules-called                      translation_1   translation_2  translation_3 ......Translation_37