1/ Google does not count since indexed, it counts since crawled (but I dont work at google, just guessing, and it is nearly the same except they probably keep an history of crawls more so than an history of indexation, especially as they recrawl); as crawling is 1 thing, indexing another.
example you make a link, it is crawled, then indexed, then links gets broken, then deindexed, then fixed, then reindexed, so which date counts? I think they still have the date of 1st crawl; which they should use as they know links get broken; and not use date of second indexation (a bit futile I know)
2/ Google does not have the time to care when you are indexing your links, unless it is a huge quantity; normally the fact that they are indexed means you are good to go.
