I am trying to ask a valid question on SO, but I got blocked by the auto-question-asking-ban message. I haven't been asking many questions, have only recieved 1 more downvote than upvotes as downvotes since the last time this happened, and it blocked me again. I feel that the filter used should have it's sensitivity slightly decreased, as it goes haywire after 1 additional downvote for me and others, and getting an upvote to balance it out does not seem to fix it, even after an hour.
From a first look at your questions, a lot of titles seem on the short end.
Let's take for instance
which makes me wonder what trouble you are having with a FileWriter in Java.
Continuing in the question, I read the first line
which could have almost been the title:
When I write multiple lines to a file, why does the file only contain the last line?
This invites me much more to answer your question than "trouble with ..." does. Then I don't need to go through 6 lines and 2 code blocks that try to explain what the question title should.
After that, I'm left with a huge amount of code. The file comment, imports, input, console output and most of the logic are irrelevant there. So, to help people to answer your question it would help to only paste the relevant parts such that they don't have to go through a lot of code. This shows that the code is yours and that you understand which part is relevant, which turns it from a "code reading" problem into a "what do I do wrong?" problem.
Hence, this is why you received a comment:
Bottom line of the story here is that you should try to avoid downvotes in the future by putting a bit more effort in the question such that it is more readable to your users:
The problem appears to be that you were barely above the quality threshhold when you started posting questions again after the first ban was lifted. You need to continue to actively work on the quality of your posts (both new and old) in order to put some distance between you and the ban threshhold.
I do not think any kind of hysteresis band should be added to the ban mechanics, nor do I think the sensitivity should be decreased. The auto-ban feature isn't there for your convenience, it's there to try and improve the overall quality of posts on Stack Overflow.