My double bids did become more frequent, and it happened to me with other bots too, but with them it was a non-issue, because I was immediately automatically refunded.
I promise you that your code is not the same as the newer generation bots.
It is much more similar to how buildawhale used to be, or still is, I stopped using it months ago once he declared 'no refunds' and did some bad retroactive confiscations.
He never confiscated from me and always refunded me, but this is because I left him in time.

honestbot, greengrowth, pwrup, adriatik, whalebuilder, dolphinbot, oceanwhale, upyou, upme and others all use similar codes, with the differences being in policy only, like some upvote comments and some do not, and each has its own deadline and limits and other attributes like minimal bid, maximal bid, maximal capacity, round forwarding (which I dislike) or lack of it, and more properties.
I think they all use yabapmatt's Javascript code as their core, not inertia's drotto's Ruby On Rails (or is it Python?) code.
Booster and randowhale are/were also very decent in their refunds policy.
I thought Minnowbooster was safe to use, until I encountered one case of blatant quantitative thievery by it, which did went unanswered once the victim addressed it in front of them, so I stopped using minnowbooster since I saw it.
Some true scammers use perfectly honest codes, BTW, and most of them I did not mention in this comment.
Even one that was, stopped scamming, at least for the last 2-3 weeks.
Scams by owners/delegators are usually hard to detect.
For the record you refunded me this time.