Now I gave my SIA a spin recently, I had backup of mnemonic phrase for SIA. I don't remember much but I have had couple of SIA coin with me. I don't remember which Pool I was using that time.
 So, I install SiaUI, synced it (took more than 24 hours) and used my backup mnemonic phrase and there is nothing in there. Phrase is valid as a wallet was opened but with zero SIA. Now I am wondering what really happened, why there are no SIA coin. I have some vague flashes that I had used SIA UI that time and there were few coins .

What could have happened or what I am doing wrong ?