I wouldn't necessarily say that SIU has trouble scoring, I think they just have trouble running an offense when they have to stand around and stall for 15-20 seconds of the shot clock. Teams will rarely be blown out with that technique and if the other team happens to get hot and you miss a few shots in a row then your toast. SIU can score when they make a quick attack but when they slow it way down for most of the game, they just can't get in a rhythm.
Jason