The brain is a curious thing. Sometimes it is just your brain making connections because we have evolved to seek patterns – and sometimes see them when they don’t exist.
It’s also possible, however, that you do look at clocks more often when it is x:11 than other numbers. Say you get up at a certain time, it takes you around the same amount of time do get ready every day, you look at the clock and it’s 7:11am. You may have a habit of looking at a clock periodically, and the desire to do so could be approx 1 hour (you desire to look at the clock when you have not looked at it for about one hour). Bingo, it happens to be 8:11am. Then you look at 9:09am, and 10:13am, and 11:11am. Wow, now your mind starts to see this as a pattern. Sure, this is an exaggerated example, but it is a possibility that there are patterns you are not conscious of.
I recently saw a pattern that I was unable to figure out, although now it’s obvious. Twice a day I put a mug of water in the microwave. I reach right in, holding the mug’s handle, and put it in. The mug’s handle is facing the front of the microwave. Then, I would set the timer. Invariably (100% of the time) the mug’s handle would be facing the back of the microwave when the timer was done, which was a real pain considering how hot the mug is. The thing that really got me was that I was using different times to heat the water, yet it was always facing the back. Then I had the “what are you stupid?” moment, when I realized that the times I was heating the water for were all steps of 5 seconds (2:40, 2:45, 2:55, 3:00). It was then obvious that my mysterious mug handle was just a symptom of the fact that it takes 10 seconds for the turntable to make a single cycle (5 seconds for my damn mug handle to be facing the back).
Anyway, probably just your mind seeing patterns where there are none. Or there could be a minor pattern that could be misinterpreted or exaggerated. Or I have no idea what I’m talking about because I haven’t slept and am running on caffeine.