the newest problem i have with them is the adcenter. I set a $4 daily limit and I know it will run over slightly (google and yahoo have only run a max of $0.60 over a day after a month of accounts with them. I have only had a adcenter account for 4 days, my total is already 25.22, thats $6.30 per day. I mean come on, the interface is the worst out of the 3 and they cant even control their system. I have never owned a mac but after all the vista bs, my next computer will be.
I'm sorry that you're experiencing budget issues with adCenter. I wanted to let you know that at times, your daily budget target may be exceeded slightly, but your maximum monthly budget will not be exceeded. If you have more questions I encourage you to contact adCenter Support - they'll be able to look into your case specifically and answer any questions you may have.
I don't like how they do the budgeting either because if you set daily limits then you are required to have a small number of ad groups per campaign otherwise it will not spend because it tries to hold out and share the budget with all your ad groups. Google does it best IMO. I also learned today that unless you have a destination URL your ads will not work.... aparently when the ads say "Default URL" that is just place holder text for, this ad isn't going to display unless you type a URL. Why not make Default URL literally mean, the default URL of the advertisers website?