It's not wrong, just that we shouldn't be overly focused on their being a set ratio. Ie, our tanks need Ca and Alk, but that "balanced" ratio will vary to some extent. For example, on a system relying mostly on kalk, the kalk should be close, AND it will need corrections from time to time.
In your case, things have drifted a bit and you are currently seeing higher Ca, and lower alk. Adding "balanced" additives such as Kalk, or AFR (note concerns/limitations as noted by Dong) should basically be keeping your numbers at that same ratio because they are "balanced". "balanced" just isn't quite "balanced" to what your tank needs at the moment.
*Dong, am I saying this right?