Do pact archetype wizards have full curse progression?

I’m pretty sure that I can’t be reading this right, but the pact wizard archetype from 5th level says you gain an oracle curse and you count your oracle level as half your wizard level. Looking up the oracle’s curses it says that the curse has a level equal to your oracle level plus 1/2 your level in any other classes. To me this means that at say 10th level you count your oracle level as 5th, no problem there, but the description under the curse suggests that you have 10 class levels which would give an additional 5 curse levels. Did they really mean for the pact wizard to get full curse progression? I can’t find anything about it.

Curses do apparently progress without level of oracle, was this just supposed to indicate a more serious advance than just a 1 level dip in oracle could expect?