What exactly is the maxinum number of celestial coins you can hoard?

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I am playing the Xbox One version and the ingame description states that seven is the maximum number. However on the official wiki here. It states that 14 is the maximum. Also on the Vault of Piety page, it shows that some items cost 11 celestial coins. How is this possible? Which piece of information is correct?
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What can you do with celestial coins?
Ardent Coins can be gained by using Invocation for the first time on a given day. This currency is permanent, unlike its counterpart Celestial Coins. The coins can be spent in the Vault of Piety.How do I get more ardent coins?
It can be opened by going to the riches tab in the inventory and pressing "spend" next to the Ardent or Celestial Coins, or by clicking on the smaller circle of the Invocation counter.NEVERWINTER WHAT ARE ARDENT AND CELESTIAL COINS+HOW TO GET THEM
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