Expansion slots

[EventHorizon]

I'am thinking of taking advantage with the bargain sale event. I just have some question about these expansion slots.
1. Can Heraldy Expansion Slots and Talisman Expansion Slots be bought by using DNP (reward from DNP rebate)
2. If I buy 2 Heraldy Expansion Slots and use 1, will both expire at the same day? (same with Talisman Expansion Slot)
3. If I buy 2 Talisman Expansion Slots (90 days) and use both (If its possible), will the duration become 180 days? (same with Heraldy Expansion Slot)

[Ennemie]

1. Can be bought with DNP
2. Cannot be stacked

[EventHorizon]

Thank you for answering my questions ^_^

[Xenocho]

Question 2 and 3 is invalid because you cannot buy the expansion slots when one is currently active. The expansion slots are activated upon purchase (immediately after currency is deducted).

[EventHorizon]

Thank you for answering my questions ^_^