The 1 for 1 main dish is weird.
U have to order a veg/beancurd dish (11.90-14.90) then free main dish ($10.90).
Can’t order 2 main dishes cos MUST have 1 more expensive dish (can’t have equal value).
So I ordered a medium sized main dish (priced at $10.90 x 2, but portion is not double of regular size 😒), and a veg ($14.90), and ask them to charge the more expensive dish then. And they did.
Doesn’t make much sense for this 1 for 1....
The conditions are not clear on the app.