Hyphenated words

If a set of proofs contained the text "an 18 year-old", and "an up to-date dictionary", would you intervene, and suggest in either/both case/s, that there needed to be an additional hyphen? The jury may usually be out, when it comes to hyphenation, and the author/editor's style is usually respected; but would it be seen to be incorrect/too sloppy to only partly hyphenate what are usually entirely-hyphenated terms?

Any thoughts?

Thanks!