Suggestion to Steemauto: Add the setup to upvote posts less than certain time

I've been testing steemauto these days. I found that the fan base tool is not reliable. when I set up the waiting time of auto upvote, Steemauto miss votes often or delay too much time for the upvote. I wrote a bug hutting article before about the problem.
Recently I found steemauto upvoted one user for me after 17 hours which I set up to upvote after 30 min he posted. I thought it may be the same problem that Steemauto delay for the upvote again.
One day, I revised four of my old posts at the same time. I found that a user upvoted those posts right after I updated the posts. My another friend also told me he used Steemauto to upvote my posts, and Steemauto upvoted my old posts after I update them.
I suddenly realized the post I upvoted after 17 hours may not be the delay problem. Maybe the author updated his post so that Steemauto upvoted his old post for me.

Normally I would like to upvote around half an hour to maximize my curation rewards. I'd like to upvote my friend's new post rather than his old post.

I suggest that Steemauto doesn't treat the re-edit post as a new post. Or add a rule user can set up the system only to upvote posts less than ___ hours. So that I won't upvote author's old post I don't want to upvote by accident.