Almost a repeat of what's happening in my organisation...
http://www.deskdemon.com/dnet/index.php?topic=10432.0Much as I hate to use this word, there are 'wasters' in every company. The problem is, they are ignored or rewarded because they are favoured by management. Sadly it's all too common these days and if a manager is too scared of someone or likes how someone else books their travel, then they will never approach the unapproachable.
It's Friday, so first of all get through today and then look forward to your weekend. If there are other opportunities in your organisation which you can apply for, then go ahead. However I wouldn't jump ship just yet.
The secretaries in my company got together recently as a group to discuss how we are going to approach the new change in duties that we weren't directly informed about. We are now in formal discussions with management and I suggest you might want to ask similar questions if you feel that's the route you want to take.
We have another meeting in one month's time to feed back any issues about workload etc so you could use my experience to do the same.
Let us know how you get on.