If two power supplies are connected in parallel and the voltage difference between them is small <0.5V, it's unlikely any damage will be done. The power supply with the higher output voltage will simply supply most of the current. Going from the original post, this is exactly what's happening here. Disconnect both power supplies, measured the voltages and you'll no doubt find the one with the lower voltage isn't supply much current.
Connecting two power supplies in parallel isn't good practise, as it can result in instability and oscillation and is not recommended, unless the power supplies are specially designed for it.