Taiwan 2010 purchase list doesnt show those numbers. See the 2010 details no AIM-120C5
Furthermore Taiwan didnt received any AIM-120C5 in 2010, on the otherhand in 2010 was complaining about the maintenance issue associated with it same due to humidity.
Incidentally in 2010 Pakistan did started getting AIM-120C5.
Which somehow is missing in that document that you shared.
Src: https://www.everycrsreport.com/files/20130314_RL30957_5953f31cd413d7203cc799f346f9bb4e926c34b7.pdf
This is not an official document .. Official US govt documents for fms showing that contract for taiwan is present earlier in the thread