Hi!
As Gerard has pointed out before, he prefers to re-enter statements instead of approving them. This means that the real number of "imported" statements is higher than what is shown in the dashboard (how much so depends on how many statements Gerard and others with this approach have added). It seems that one should rather analyse the number of statements
Yes, I do that sometimes too - if there is a statement saying "spouse: X" on wikidata, and statement in Freebase saying the same but with the start date, or the Freebase one has more precise date than the Wikidata one, such as full date instead of just year, I will modify the original statement and reject the Freebase one. I'm not sure this is the best practice with regard to tracking numbers but it's easiest and even if my personal numbers do not matter too much I imagine other people do this too. So rejection does not really mean the data was not entered - it may mean it was entered in a different way. Sometimes also while the data is already there, the reference is not, so the reference gets added.