I did a check, in ethgasstation the current safeLow = 15GWei, which is equal = 15,000,000,000 wei
However, when I issue eth.getBlock("latest") what I get was:
> eth.getBlock("latest")
{
difficulty: 3462313604051830,
extraData: "0x73656f3130",
gasLimit: 8000029,
gasUsed: 7991485,
The gasLimit and gasUsed here are way lower than the safeLow value. So I can only guess that they are using different units in measurement.
Otherwise I really do not know what might had gone wrong. Because I had never enter so many zeros when I wanted to send an ETH transaction.