Джедай-магистр - выдумка переводчиков. Такого звания в принципе не существует.

* Jedi Master – a Jedi Knight who showed great understanding of the Force and managed to instruct a Padawan and train them successfully to the level of a Jedi Knight. This title could also be achieved through the performance of extraordinary deeds, or retaking the trials. Self-proclamation of the Jedi Master title was rare and frowned upon by the Jedi Council (for example: Jorus C'baoth and his unknown clone Joruus C'baoth).
o Councilor (or Council Member) – A very few Jedi were invited to serve on the Jedi Council, the governing body of the Order. The Council was made up exclusively of wise, experienced Masters. The only Jedi Knight to sit on the High Council, Anakin Skywalker, was appointed by Supreme Chancellor Palpatine, although he was not granted the rank of Master simply because of this. Ki-Adi-Mundi served as a Councilor while undergoing the process of becoming a Master at the time of his invitation before Anakin, the Chosen One. The Council was made up of 12 masters, five of them holding life terms (two of them designated as "senior"), four holding long-terms, and three holding short-terms.
o Master of the Order – The title used to denote the leader of the Jedi High Council. This title was held by Mace Windu until the beginning of the Clone Wars in 22 BBY, when he gave the title to Yoda.[2]
* Grand Master – The highest rank of the Jedi Order was that of Grand Master. Yoda was once the Grand Master, as was Luke Skywalker following the Swarm War.

Вукипедия

Судя по фильму и сериалу рукопашку они изучали плохо. Вполне вероятно, что ее просто не рассматривали как что-то, имеющее сильное влияние на поле боя в век стрелкового скорострельного оружия.