I've got so say.. I've found it that places require or insist on a resident certificate... Which as no checks and purely where you've told them you live? This can be said about 90 day report too...?
You've neglected to mention what passport you hold???
Assuming you are eligible for 60 fay exempt and 30 day extension? Then you should be fine with that. Nothing what you've done should effect that? If you had done previous extension or back to back stays.. Then you could potentially have trouble.
Play safe and get a tourist visa, but personally I think your fine.