Question about the Skin Bundle's price.

Maybe someone can clarify this, as I feel like I must be reading something wrong.

I bought Path of Titans - Full Access, for $30.00
I wanted to get the All Exclusive Backers Skins version but I was told I could purchase the All Exclusive Backers Skins in-game later on.

Today I decided to get the Exclusive Backers skin bundle - but the pricing seems very wrong.
According to the in-game shop, I would need to purchase the minimum of $45 coins to buy the exclusive backers skin bundle.
That's twice the price of the base game. [Currently $22.50]

When I go to the website, the Game + All Exclusive Backers Skins is only $37.50 right now.
It would be cheaper for me to re-buy the game then to buy the exclusive backers skin bundle.

I feel like I MUST be reading something wrong.

Is this correct?