The issues have been fixed, everything should work fine now, thanks for your input. I have pushed a lot of updates to the application in the past few days and it seems like I skipped some tests.

The transaction fees were copy/pasted from other exchanges, I don't see it as a problem, because these are TESTNET coins after all.

The overall speed is a factor I have been working on quite a lot, what action specifically do you think is slow and could be faster?