Product Owner barely being ready with backlog to start planning?

Just curious if I am unique.  I am the Director of Product Management, and have a staff of 6.  I am the product manager for our main product line (about 80% of our business), and I play the Product Owner.  Today was planning sessions, and as usual, I was working on my backlog until late last night.  It seems like I get it done in time, but it is always a crunch to get it done.  

Does anyone else barely get the coming iterations stories and acceptance criteria done on time?  I am fortunate that I have a deep well of ideas, and a knack of pulling it all together as needed, but all effort to get an iteration or two ahead have been thwarted.

We don’t give date estimates for bug fixes. Quit asking.

As a long time product manager, one of my pet peeves is the bug/hotfix process.  Stepping back, we have a well defined triage process, where a good team of dev, support, and support engineers (as well as myself) sit in a room, and agree on priority, severity, and even whether it is a defect, or just desired different behavior requested.  This works well.

Issues are brought in, verified, assigned severity (and if there is a work around, that lowers the severity, as you would expect), and tossed into the queue.

The maintenance team, 3 developers, then pull items from the queue in FIFO with some stack ranking due to priority.  At any one time we have 30 – 60 issues in queue.

What this rant is about is the constant badgering I get from sales.  “When will issue X be done?”  “Why isn’t {insert pet issue} done yet”, “I am going to go to the division GM if you can’t give me this this week”, among other less printable comments.

As there is a queue, and it is ranked by priority and severity, we get to them as we get to them.  We do not make duse dates available.  I will not commit to more than “It is in the queue, and the team will address it”.  

Sigh, I seem to lose 2 hours a week in these pointless discussions.  I have an idea, why don’t you find a bug in Windows, and call Microsoft support.  See how much “pull” you have there.