The talismans that are in the store for FC (Redemption, Avenger, Sacrificial, Serenity, Mark) say that you can buy 3 per month.

However, when I bought the Redemption, Avenger and Mark talismans, they came up as locked till the end of the month (ie: 1 per month).

Makes it hard to buy a 3 set of Mark talismans (since only 2 different types are available, so you can only buy 2 a month). Also, this sticks you with a 3 set of Redemption/Avenger/Sacrificial/Serenity talismans of differing types (ie: you can't buy 3 of one type, such as "Ward").