Can't See New Themes

BetterCampus has been showing me the same themes as the newest ones for months. I tried uninstalling and reinstalling it, but all that did was add 12 more themes (the themes circled in the picture are the ones that had been the newest for months), and I feel there must have been more than those published in this period o

f time. I also tried clearing my cache but that did nothing. I’m at a bit of a loss.