I agree that it's confusing, and it took me quite some time to figure it out over the years, but footnote 5 is very explicit in explaining this exact situation.
Alright then. Glad you helped me figure this out. TP!
1. Horford $27,734,405
2. Bradley $8,808,989
3. Crowder $6,796,117
4. Thomas $6,261,394
5. Tatum $5,645,400
6. Brown $4,956,480
7. Smart $4,538,019
8. Zizic $1,645,200
9. rookie minimum $815,615
10. rookie minimum $815,615
11. rookie minimum $815,615
12. rookie minimum $815,615
Total : $69,648,464
$99,093,000 - $69,648,464 = $29,444,536
That's $283,364 short of Hayward's max ($29,727,900).
Having said all that, since yesterday there have been rumors that Hayward may be willing to sign for less than the max. If that's the case, perhaps offering him $283,364 short of his max isn't a big deal after all. Wouldn't bet on that, but wouldn't rule it out either.
Why is Tatum being paid more than Jaylen? Aren't they both No.3 overall picks? Or did Tatum sign for more?
They both signed for 120% of the rookie scale. Thing is, the rookie wage scale changes every season. Here is the rookie scale for the 2017-2018 season.
http://basketball.realgm.com/nba/info/rookie_scale/2018