But that's just how independent probabilities work. If you have 4 events stacking and each are 50% likely, the chances of them all happening at once is only 6%. This isn't that much different.
The odds Opta are working on are:
Fulham have a 21% chance of beating us - feels about right
Newcastle 67% chance of winning - literally as strong as odds get in the PL, Liverpool have weaker odds
Villa 51% chance of beating United
Chelsea 43% chance of beating Forest
I'd love to know what odds you would give each of these fixtures that will make the maths so drastically different?