The spell slot progression was rebalanced without updating the example text.
The Blood Hunter 1.3 (.pdf) published at Geek & Sundry has a table for the Profane Soul Blood Hunter that matches the quoted example text:
Blood hunter level |
Cantrips Known |
Spells known |
Spell Slots |
Slot Level |
3rd |
2 |
2 |
1 |
1st |
4th |
2 |
2 |
1 |
1st |
5th |
2 |
3 |
2 |
1st |
6th |
2 |
3 |
2 |
1st |
7th |
2 |
4 |
2 |
2nd |
8th |
2 |
4 |
2 |
2nd |
9th |
2 |
5 |
2 |
2nd |
10th |
3 |
5 |
2 |
2nd |
11th |
3 |
6 |
2 |
3rd |
12th |
3 |
6 |
2 |
3rd |
13th |
3 |
7 |
2 |
3rd |
14th |
3 |
7 |
3 |
3rd |
15th |
3 |
8 |
3 |
3rd |
16th |
3 |
8 |
3 |
3rd |
17th |
3 |
9 |
3 |
4th |
18th |
3 |
9 |
3 |
4th |
19th |
3 |
10 |
3 |
4th |
20th |
3 |
11 |
3 |
4th |
Profane Soul Spellcasting table from version 1.3
As you can see, at 11th level the spell slots upgrade to be 3rd level slots. The more recent version 2.11 rebalances the spell slot progression. Matthew Mercer writes in the update notes:
The Profane Soul spell slot and spell level progression has been altered to further balance the class in line with other Hybrid caster classes, and to fix a serious issue with Warlock multiclassing.
The spellcasting table was updated to:
Blood hunter level |
Cantrips Known |
Spells known |
Spell Slots |
Slot Level |
3rd |
2 |
2 |
1 |
1st |
4th |
2 |
2 |
1 |
1st |
5th |
2 |
3 |
2 |
1st |
6th |
2 |
3 |
2 |
1st |
7th |
2 |
4 |
2 |
2nd |
8th |
2 |
4 |
2 |
2nd |
9th |
2 |
5 |
2 |
2nd |
10th |
3 |
5 |
2 |
2nd |
11th |
3 |
6 |
2 |
2nd |
12th |
3 |
6 |
2 |
2nd |
13th |
3 |
7 |
2 |
3rd |
14th |
3 |
7 |
2 |
3rd |
15th |
3 |
8 |
2 |
3rd |
16th |
3 |
8 |
2 |
3rd |
17th |
3 |
9 |
2 |
3rd |
18th |
3 |
9 |
2 |
3rd |
19th |
3 |
10 |
2 |
4th |
20th |
3 |
11 |
2 |
4th |
Profane Soul Spellcasting table from the version released in 2020
This table matches the table on DND Beyond. Unfortunately, Matthew Mercer did not update the "for example" text in the "Spell Known of 1st Level and Higher" section, which still reads:
When you reach 11th level, for example, you learn a new warlock spell, which can be 1st, 2nd, or 3rd level.
Based on Mercer's notes, the table in version 2.1 and on DND Beyond is the most up-to-date spell slot progression for the Blood Hunter with the mistaken "for example" being an artifact of a previous iteration.
1 The most recent version can be found here. It does not have a version number, but was published in 2020 (2.1 was published in Spring of 2019). It does not fix the discrepancy between the example text and the spell slot progression table.