I agree this is very frustrating!
If you look at
this update posted by Metrolinx this week, it notes that :
"The second upgrade recently completed is a new second platform at Guelph Central GO Station
The new platform helps expand GO Train service on the Kitchener Line by creating the infrastructure needed to run two-way, all-day service between Kitchener and Union Station in Toronto."
However, if you look farther down:
"Plans for the next phase of work are well underway. This package is expected to go out for construction companies to bid on in 2024 and includes:
Passing track at Guelph GO Station"
This would seem to suggest that the west half of the Guelph siding is part of a different package of work that has not even put out for bids yet. If true, this makes no sense to me.