I think the limit of 7 is solely for Bhikkhus not novices or Anagarikas but the 8 vows of an anagarika are observed on the moon phases anyway so it would only make sense for no limit to apply also.
This offering maybe right, or wrong, but it is one, the other, both, or neither! Blog,-Some Suttas Translated,Ajahn Chah. "Others will misconstrue reality due to their personal perspectives, doggedly holding onto and not easily discarding them; We shall not misconstrue reality due to our own personal perspectives, nor doggedly holding onto them, but will discard them easily. This effacement shall be done."