I've made the observation that a summer student in a minister's office is under exactly the same rules as a minister or a deputy minister. Sometimes this creates some problems for that summer student. For example, if they're relying on a McDonald's job for the year, they have to give that up in order to be able to work in the minister's office. The other problem with short-term appointments is that sometimes they're gone before the end of the 120 days that they have to comply. Certainly if there were anything they had to divest, which in the case of students is probably fairly unlikely, there's a problem if their tenure is about 120 days, because it's silly to divest and then immediately get it back again.
I wouldn't exactly call them anomalies, but there are difficult situations in applying this act sometimes. There's a different range of categories of people covered by the act, and sometimes one size doesn't fit all perfectly.