Loremaster and Mystic Theurge do not stack properly for Oracle spell progression

In this example I took 4 levels or Sorcerer (seeker) and 4 levels of Oracle (seeker). After that I took 10 levels of Mystic Theurge and 10 levels of Loremaster (chose Oracle for spell progression).

When I started taking levels in Loremaster it didn’t let me choose a new spell for Loremaster 1, then started having me pick a level 1 spell, level 1 and level 2 spell, etc as I kept taking levels in loremaster as if it was starting the progression back at that of a level 1 oracle. By the end I was never offered 8th or 9th level spells. The only 8th and 9th level spells known were those granted by the life mystery spell list.