Another thing to always do is always make a test deposit first. Then your larger deposit afterwards. You should probably make a test withdraw from the exchange. This can be bothersome though if they withdraw fee is high. If you dealing in a large amount of crypto then you definitely should do a test withdraw. Always check your address and the address you sending to. This is also another reason you should make a test deposit/withdraw. So you deposited.withdrew to the same address again twice in a row and the chance of making the same mistake twice is little.