well yes, but I don't think it's necessarily bad to go about it like you described, as long as you know that you're not actually using the smaller issues to procrastinate on the big issues. Tackling the smaller issues first can help you to understand the bigger issues better, both consciously and subconsciously, so as long as it doesn't actually matter in which order they're done, I think it can be more effective to do the smaller ones first. That all goes out of the window of course if you're using the small issues to avoid having to think about the bigger ones