Hi, Patkay! Everyone can use a 'makeover' every now and then, right? Even if it's a quick freshen up, sometimes editing can make a world of difference.
Your experience with your profile is fairly normal, I think. No matter how closely and carefully we proofread, it's always possible for typos and other errors to get past us. I don't routinely edit hubs on a regular schedule, but I do like to revisit them occasionally and particularly when readership starts slowing down. Seems I always find something that can stand tweaking when I read my stuff. However, I will not change minor things--don't want to anger the Search Engine gods by frequent and furious edits--until I have several issues to address or new, updated information to add.
Good luck and keep writing!