Cost of Hoarder's Edition w/ current 20% off sale price...

Cost of Hoarder's Edition w/ 25% LN discount applied...

No matter how much I try, I can't get my calculator to corroborate FL's math. If $2.19 is 5% of my cost, then I should only be paying $32.85 for CE. Where am I going wrong?
The (not so) funny thing is that I suspect that $2.19 could be the result of having the Full Feature Set taken from me in trade for LN.

So I'm left wondering:
1) If the $2.19 "savings" is for the FFS, am I really getting $0 and 0% savings by joining LN, rather than the advertised 5%?
2) If I'm paying the same amount in both cases, why am I not getting the FFS if I join LN? I understand that may not "need" it since LN includes it. But if I eventually quit LN, am I going to lose the features that I paid for (again, my price is the same w/ or w/o FFS) but "didn't need" with LN?
Would appreciate any explanation that accounts for this apparent incongruity.