I think the issue's cleared up. I just saw my DS points were less than the day before, which that one rakghoul quest with the LS/DS option must've been responsible for. Which means, I think, once you hit 10000 LS points, for example, the next LS points you earn detract from the DS points you may have gotten, until none are left. In that case, mim, I think one LS option was all that was needed to erase those 3 or 4 DS points you had gotten.
If I'm right about this, then luckily I can still earn LS V.