Yes, they were captured within 2 minutes of each other. There is a backup pool set, but it hasn't received and shares at all if that's what you're wondering.
May I ask what the formula for calculating hashrate from the diff 1 shares is?
Diff1 shares per sec = hashrate (2^48/65535)
Not quite simplified... Diff1 shares per sec = hashrate (2^32)
So, hashrate in hashes per second divided by 4294967296
Edit: Realized the original question was the opposite, so:
hashes_per_second = (diff1_shares * 4294967296)/time_in_seconds