Noob Anki Question

Just recently started using Anki again for some vocab.

I understand the basics, and have been able to do my reviews without issue. One thing I don’t quite understand however, is the spacing of when words will re-appear. Many of the items in the deck I already know, and choose the biggest interval (i.e. 2 days, 4 days etc). I’m finding though that even for items I’m sure I’ve selected 45 days etc, I still see it if not the next day then very soon after.

I’m not sure if I screwed something up whist importing the deck or similar.

NB. Sorry if this is in the wrong forum.