Immigration always says they can't. But I got two extension stamps 30 days each time, into this pages while I waited for a new passport. Each time it was "one time exception" because I explained that I can't get new passport faster. So try to talk with them...
it will be 94 days. but they can do +30 and +7, I don't see any issue here, except they can be asked about tickets. And, why to answer 6 times same about dates, when question was about checkin on Eva air, that ask about visa always in same way:)
Funny. But correct answer is - just ignore this question and continue. Eva air's check in form is a bit confusing, but you can left it empty and finish checkin