There seems to be a difference between the available Store Credit of yours with the site currency you had picked previously. Would you like to:
World of Kings Currency USD $5.9
Phantasy Star Online 2 New Genesis (PSO2) Currency USD $8.48
World of Kings Currency USD $49.35
World of Kings Currency USD $7.59
Phantasy Star Online 2 New Genesis (PSO2) Currency USD $39.98
Phantasy Star Online 2 New Genesis (PSO2) Currency USD $4.29
World of Warcraft: Midnight Currency USD $5.51