Why? Basketball is a game of runs...every team in the league is going to have games where they have a big lead which then evaporates, including the eventual champion. It's annoying when it happens, but being "troubled" implies that it's a bad sign for the team which I just don't see.
I don't see a trend. Did they play to the level of Minnesota or Memphis? They beat San Antonio by double digits, barely lost to Denver and split with Houston (who has, so far, been playing like a good team). They don't look perfectly in sync, but they also don't look like a team lucky to have the record they do, IMO.
No, but it also doesn't sound all that alarming. I think Roy will figure it out, and the team will figure out the best way to play to maximize the talents on hand. It's not like Roy has been a non-factor so far. A little confusion while they recalibrate their team offense is not that big a deal. If they were 4-9 during that stretch, it would be a problem. I don't think they're playing their best basketball and yet they're in perfectly good position to contend for one of the top seeds, through the early going. Sure, there's been an assist from the schedule, but even when the schedule toughens, the team is likely to be better due to more experience playing together.
Mainly, I've realized over many years of watching the NBA that you can't discern season trends or stories from how a team is winning (or losing) games over a short stretch early on. The dynamics keep changing. You just want to see wins over any particular stretch of games. If later in the season, they still seem to be out of sync, it'll be a bigger worry...especially if it is translating into losses. Until then, though, enjoy the wins...they count for the same in the standings no matter how they come. I don't think you can translate how they beat Detroit into how they'll play against the Lakers or Celtics.