It appears to be the latter, the DA didn't like the results of the DNA test so now he's saying the DNA test is not very important.
What appears to have happened is the swab samples of the accuser were sent to the lab followed by the samples in the bathroom and the swabs of the 46 players.
After running the tests, the lab determined there was no DNA (other than her own) on the samples taken from the woman. Therefore, there is no foreign DNA to match to anyone, not just the 46 players.
So it appears the DA didn't know that the lab would find there was no foreign DNA on the woman when he asked for the players' DNA. From his various public statements he seems surprised by the result of no foreign DNA and no matches, so is now backpedaling from his earlier statements about the importance of the DNA test, such as the sworn statement you cited in your post.
Bingo.
Using Occam's Razor, that's certainly the most likely explanation for the facts we have to work with.
The fact that the accuser claimed there was a "struggle" with the "rapists", and left behind a couple fake nails, yet there was no player DNA found on them, is extremely telling.
Yes, that's exactly what happened, and he got the rape kit results back before he let on, too, because he was back-pedaling before the totality of the results were supposedly back. So, the DNA dragnet backfired on him Big Time, as Dick Cheney would say. He need never have done the DNA dragnet, and then he wouldn't have a situation of him sitting there with 46 negative DNA samples.