This happened to me. The address shown in my Spreadwallet wasn't the one where my SPR where during the snapshot due to change addresses being used by the wallet. Check the Spread explorer to find the correct address.
No. I have 6K spreadcoin during the snapshot. Held until around January 5, 2018, when I sold it. Now the balance that shows up on my account is still the one after January 5. (11 HLM).
It's the reason why I'm asking if the snapshot date has been moved.
Make sure to enable coin control in the SPR wallet and check whether you exported the correct keys. The 6k might be in a change address.