You’ve strengthened your spellcasting to power you in combat.
You gain two 1st-level spell slots, but you can prepare only certain
spells in them: fleet step, jump, mage armor, magic weapon, and
true strike. Automatically add these spells to your spellbook.
When you can cast 4th-level magus spells, the extra slots
increase to 2nd level and you add the spells resist energy,
spider climb, and water breathing. When you can cast 5th-level
magus spells, the extra slots increase to 3rd level and you add
the spells feet to fins and haste. When you can cast 6th-level
magus spells, the extra slots increase to 4th level and you add
the spells fly and freedom of movement.That reads to me that you gain 2 spell slots of 1st level. When you get 4th level spells those same 2 slots now can cast 2nd level spells, later on they can cast 3rd level spells and etc.
Basically, it's not 2 slots of 1st level, and 2 slots of 2nd level, and 2 slots of 3rd level, and etc
But they will always be just 2 extra spells of varying levels.correct?
From the way it's written, the extra slots for the limited spell list step in much the same way the regular slots do, increasing in level rather than adding new spell slots of the new level
Yes, those are two slots of the two levels bellow the highest you can cast, up to 4th level. Basically freeing you 2 slots for buff spells.