I've set my bid increment to 3s but the default setting isn't changing?

Hello Colin,
Thank you for your question about the lead time. I think you are asking about lead time (not bid increment).
Are you trying to set it on the dashboard? This is set through Preferences.
Let me know how you are trying to set the lead time and I can help you troubleshoot.

I've tried setting it both ways with no effect

Hmm. I just checked, and it is definitely set to 3 in your Preferences, and in the database. And on your dashboard it defaults to 3.
Perhaps you can try logging out, then log in again? Let me know please.

still showing as 10s on my dashboard

I noticed you have two accounts with us. Which one is listed in the upper-right corner?
Also, would you mind trying another browser?
It still looks ok on this end when I log in as the account of your post.

Still the same, my preference is set to 3s and my dashboard shows 10s still.

Questions:
1. I noticed you have two accounts with us. Which userID is listed in the upper-right corner?
2. What browser did you try?
You have two accounts with us.

I thought the other account had been cancelled. Account codor1

To better understand the issue, could you describe exactly what happens when you try to set your lead time? For example:
1. Are you receiving an error message? If so, what does it say?
2. Are the changes you make not saving, or are they saving but not showing on the dashboard?
3. Does the issue persist after clearing your browser cache and refreshing the page?
The more details you can provide about what you’re experiencing, the easier it will be for me to pinpoint the problem and resolve it.
Looking forward to your reply.