10 x 1/4 Mile Repeats

Was intending to do 10 x 1/2 mile repeats, but messed up while programming the garmin, and ended up doing 10 x 1/4 mile repeats. I was pressed for time, so I had programmed in a 1/2 mile warm up / cool down, then during my first repeat when I looked down and saw 300 ft to go, I knew something was up. Worked out OK, probably didn't need to do half mile repeats with running Saturday and Sunday as well. Warm up 1/2 mile at 10:02 pace, then stretched for 2 minutes, then ran for 2 minutes, then did 10 1/4 mile repeats with 2 minutes of walking between. Repeats were at 7:46 pace (first one where I thought I was doing half mile), then 6:56, 6:58, 6:58, 6:57, 7:00, 7:05, 6:57, 6:54 and 6:50. Cool down 1/2 mile at 9:42 pace. Overall 4.96 miles in 49:27, 9:57 pace.