Yeah, I can see how that would be annoying. Sadly, apart from 知事 and 知 (which is already on here as 智), I cant really think of any words that use the ち reading that can be learned at a low level.
Yeah, I find that annoying… I’d basically forgotten the on’yomi for that one by the time I got the first word to use it. I remembered it soon enough, but it would be nice to throw in one word earlier on, or move the kanji to a later level if that’s not possible.
Then again, I also just generally find it a little confusing when they teach you the kun’yomi with the kanji. I know they take the approach of ‘most frequently used’ and I’m on board with that, but it’s so often the on’yomi that it does throw me a little when that’s not the one provided.