There are at least two other typos in the rule book. I imagine someone on your end has already found all of them, but in case not:
The table of contents says there should only be 10 Feodums, instead of 12.
In the FAQ about knights, it says that all but one cost $5 and the other costs $1 instead of "$1 less."
I didn't read the whole thing, but noticed those two upon first glance. Hope I can be of help to you.
Well that should have been $4, not "$1 less." I can report it to Jay for future printings.
"Cheaper" on Catacombs is probably just because I was also saying "cheaper" on another card that didn't make the cut. That card had "cheaper" because it had two clauses in one spot and shortening the one to "cheaper" seemed like an improvement. Wei-Hwa said, do we need to define cheaper, and I said, I think people will know what it means. Then the other card died but I never thought of rephrasing Catacombs.
In general I don't stick with old templates if I think I have better new ones. Like, originally the word "card" appeared more often. I can just say Silver, I don't need to say Silver card, that's what I think. But if I'm not intentionally changing something I do try to be consistent.