During Seeker, Slayer, Survivor, the vendors in the temple (Caretta, Cook Corrin, Winge, and Neale) should offer a series of discounts based on the player's reputation with either of the Seeker/Slayer/Survivor factions - 5% for Good1, 10% for Good2, and 15% for Good3. However, the conditional logic for this in lax1_factions.gamedatabundle is such that the rate for first condition (5% discount depending on if the player has a Good 1 reputation with Seeker/Slayer/Survivor) will be selected even if the conditions that follow are met. This means that 5% is the highest discount achievable, regardless of if the player has a higher reputation to satisfy the conditions for a 10% or 15% discount.
I assume fixing this is as simple as reversing the order of the ConditionalRates under each of the vendors in the above gamedatabundle, so that the logic can cascade correctly (first checking if the reputation is >= Good3, then Good2, then Good1). Testing with this change seems to cause the discounts to apply correctly based on reputation.