Might have figured it out
The problem (probably would have been useful to tell you in the first place)
There was no error code. Searches would simply say "loading" and keep spinning for several minutes and the results would never load
What I did wrong
I did a search with 5 origins * 6 destinations * 6 days, which is way over the limit
What I didn't realize
Usually when I don't realize I'm doing heavy searches, there'd be an error telling me that my search is way over the credits allowable for one search. This time, there was no error, so I kept forcing the search through, and it wouldn't load
What's wrong, then?
There is no error message anymore when a single search is too big
Credits continue to accumulate
The results don't actually load
A simple YEG-YVR search for one day in the future loads just fine