Invictus gaming signature set

so I saw that the invictus gaming signature set is out and I thought 13k is a hefty Price but than I saw I only get 5% off the full bundle with the Champs, even though I have all of them and they would add up to probably 3-4k or even 5k in RP value so it would probably be around 10k RP and not 13k, is this a bug?
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