Add them as merits with the type field set to 'Flaw.'
If you want a particular bit of errata implemented in LCA, feel free to mention it on the Discord or open an issue on GitHub. Or (even better) submit a pull request. Links are in the sidebar!
The DBs kickstarter backer proof says the dice cap for static values is rounded up, but according to Vance, this is a typo, and the final DB book says to round down. LCA rounds the cap down for standard DB characters, but custom exalts have a 'roundup' option in their excellency builder.
The soak bonus granted by having ISoB as a control spell applies even when the character is wearing armor. LCA applies this bonus unconditionally for characters with ISoB as a control spell.