Question re: Weapon seeds. (when we use Premium Weapon Upgrade)

I am very much curious about the new "Premium Weapon Upgrades".

If I am not mistaken, if you happen to have these prem wep upgrades, it would give you the Weapon which you have the least, or the weapon you are lacking to complete your set.

I am currently on my 162nd weapon and I still need 79 weaps to complete my first set. But the reality is that the only one I'm missing is Jackalope.

The Yatto Sequencer tells me, that on my 459th weapon, I should be having 9 sets and 22 DL weapons.

But with these Premium Weapon Upgrade, If I happen to get one or more on Monday, will let me have Jackalope right? Since it's the only one I don't have.

Plus what I'm worrying about is that, will it change the whole weapon seed when I get to use the Prem Weap Upgrade?

Supposedly I should get my first set at weapon 241, but if I get one Prem Weap Upgrade, I could get it on my 163rd. which means it would not be following the sequence originally stated on the sequencer.

Plus I'm worried that the values of my sets and DLs will be different from what Yatto Sequencer tells me. I'm expecting for 9 sets+22 DLs in 459 weaps. But with these new scheme, will it be affected? or will the original values that the sequencer say change?

I hope someone could clarify this one!