problem with pivot table

You could start by coming up with a clearer description of what IS happening as contrasted with what you're expecting.

Out of curiosity, I turned to my friend Claude AI just to determine if there's a limit to the number of columns Excel can work with in building a Pivot Table. Here's Claude's answer to that question: "There is no fixed limit on the number of columns you can include in a Pivot Table, but you are bounded by Excel's overall worksheet limits: Excel supports up to 16,384 columns (columns A through XFD) in a worksheet, and a Pivot Table can draw from all of them as source data."

That said, I would make the observation that having columns of data from A to TS makes me wonder how well defined that basic database is in the first place. You're talking of approximately 500 columns--what do they represent? What do the rows represent? The Pivot Table is a wonderful tool for creating a cross-tabulated summary of data.

I've been using the Pivot Table for decades--at least 35 years now--and never come remotely close to having that many columns, though I have had thousands of rows. But each row might represent a person--a client, employee, whatever--and the columns different attributes of those persons. The point of the Pivot Table would be to cross tabulate and give a count of numbers of clients in various cities, by size of account, length of relationship, etc.

I'm having a difficult time even beginning to conceive of a database consisting of the number of columns you cite, what kind of cross-tabulation could be applied.

Help us (I ask on behalf of others who might also want to help) understand what kind of data it is, why so many columns.