I don't think we've ever made it two Wednesdays in a row for new skins, have we? It almost seems like HTC has found it easier to wait and batch them up into updates of 20-40 skins maybe every 3-4 weeks or so.
I'd love to see a regular schedule, even if its just 6 or 8 skins a week, but it might be too much effort for HTC right now.