You may also be knitting on too large of needles for the size yarn you are using. I know that the directions say to use a 10.5, but it may be that you need smaller needles for your yarn. This rug is very "leftover stash oriented" so while the designer may have used 10.5's for her rug you may need 8's for yours. Do a test swatch with different needles and see. YOu can always frog the swatches since this is for a rug afterall.
"The world now has the means to end extreme poverty, we pray we will have the will"
knitncook there, too!
OTN: Laughing Carrots; Jaywaler
FO: Potamus socks; Palindrome