[@PlatinumSkink]
In my understanding:
1. Base benefits/drawbacks that come with the patron can be swapped with universal ones or additional patron list (the exact wording is that it depends on the type of patron, for example Beacon can't swap base package or something, but I think that's unnecessary).
2. There's one additional benefit that can be taken from the universal list or the additional patron list.
3. It is possible to take additional benefits from the additional patron list or universal with the limit depending on the type of patron, if they also take additional drawbacks with them.

Horror has base 2 benefits and 2 drawbacks, and when you add the bonus benefit it totals to 3/2. Horror patrons can have 3 extra benefits with 3 extra drawbacks for them. Your sheet has 6 benefits and 4 drawbacks, so you have taken 3 extra benefits and 2 extra drawbacks, one less than required. This means that you should either discard 1 benefit, or take an additional drawback.