When it comes to this post you have nothing to be sorry about. With itch’s social features being what they are you approached the situation rather tactfully: A very civil, informative thread without naming any names and giving me the opportunity to respond as an option without any pressure.
When it comes to “fault”… Like I said: You trusted me - or rather my judgement. And at a glance, those two lists/subforums do look really similar, so I guess my mistake was at least easily replicable. Though I will be more careful in the future.
Lastly, I’m glad to hear that some of my other contributions were more helpful. I like your work as well. ;)