These boilerplate responses from these moderators are worthless. I wish they would not even reply, or at the very least not checkbox the reply as if it's a solution--which it isn't.
I know exactly what you're describing, and I hate it as well. The old XP taskbar would collapse into more than one columns when the vertical space filled up. Now, with the "improved" taskbar, it goes to a new page that you access with a scrollbar. Not
only that, the taskbar shows the second page by default.
Short answer: you can't fix this. Microsoft removed the feature completely, thinking that collapsing tasks into drop-downs, or using Aero Peek is somehow a usable replacement. It's not. You'll no doubt receive many useless responses like "oh, get used
to it" or "why would you want that when the new taskbar is so useful!" Obviously, some of these people would be content to use Windows 7 Starter Edition where only three tasks can run at a time.
What did I have to do to tolerate this taskbar? I had to hack a special theme that allowed me to have shorter tasks so that I could at least fit more than 50 or so tasks on a single column before spawning a horizontal taskbar. The current themes must have
been made for old people or for touch screens so you could press the task with a fat thumb. The tasks are like 50 pixels tall and you can only fit maybe 20 in a 1200px tall screen. You have to get uxCore to allow custom themes, get a program called VistaStyleBuilder,
and then fix the taskbar's vertical margins:
Windows Style Builder:
Windows 7 -> Taskbar & Tray Notify
Basic
Taskbar Vertical
TaskItemButton (top-link)
ContentMargins:Margins --> 10,10,1,1 (from 7,7, ..)
Replace the aero.msstyles with your new one.
This isn't a solution to your problem, but it is something that'll make the taskbar somewhat more tolerable.