The general rule is that it will recalculate any time you move to another field. I just hit tab after any entry and everything updates. Changing the Now value, and moving to another field, will cause a recalculation and then changing the Goal column, and moving to another field, should cause another recalculation. So you will see intermediate results as you change fields, but simply finish up with a tab or a click on a new cell and you should see the final numbers.
If you continue to have problems could you tell me which web browser you are using and the specific entries/clicks you make that lead to a problem?
If you continue to have problems could you tell me which web browser you are using and the specific entries/clicks you make that lead to a problem?