If you're getting a definite loop at the end, and are increasing stitches, then you are making an inadvertant yarn over stitch at the beginning of the row.
Make sure that when you make your first stitch that the yarn does not wrap around the shaft of the needle as you bring it around to wrap it. One way to avoid this is to put the needle in, making sure the yarn is hanging down the back and then make the first stitch.
Watch it as you wrap it to make sure it isn't wrapping around the needle.
"Trust the pattern!"
Time flies like an arrow, but fruit flies like a banana.
Hop aboard while we follow the cloud-covered van of knitting harmony, man!! Woooo!! --Hedgehog
IngridKH on Ravelry