All the issues here have a simple solution.
First, it is probably your internet connection. If they add more items per page, it will take even longer to download the page. It comes up very fast on my computer, so the problem is local.
Second, on search, it is much better search than on the forum page, that is, you have the ability as a user to be more specific and able to reach your desired item faster and with more reliability. The search engine is on the left hand side once in classified, half way down.
Third, in order to find your old ad, just click on your avatar once in classifieds, and all your listings will come up, the closed ones and the active. Click on the active once logged in, and when your ad comes up for the truck, just go to the bottom of the page and click on "close" ad and it is done.
Good luck guys. Hope this helps.