No, I never recieved any answers on this. What we ended up deciding is we have a tag for email blast and then one for email series. Our email series has progression steps to go from emails 1 through 6 and we left a large gap in case we decide on having more emails in the future. We basically decided that we use from from 10-20 to cover anything that happens with email 1 (so opens email 1, clicks email 1, fills out form from email 1, etc) and then 20-30 for email 2 and so on. I'm not sure if this is the best way to handle this, but so far its been working for us.