In none of these passages is ut separated from si: the hyperbaton elevates the phrase and makes more natural its use in verse.
It seems to be a mere normalization of the hyperbaton; the elimination of the elision (mittere ad) may have been a factor as well.
Note the separation of the epithets from the nouns, and the high level of diction produced by the hyperbaton.
hyperbaton Transgressio, when the ryghte 31 order of wordes is troubled, & hath these kyndes.
1570s, "figure of speech in which the natural order of words or phrases is inverted, especially for the sake of emphasis," from Greek hyperbaton, literally "overstepping," from hyper "over" + bainein "to step" (see come).