Erratic column count after exporting to csv file

Hi:

I have a table with 5,000+ rows that I'm exporting to a CSV file and then importing into a library catalog. Until today, it imported without any problems.

Today, I added HTML code to the columns that contain hyperlinks so that they will open when they are clicked. The links work.

The problem is only about 10% of the rows are now imported. The other records say "Column Count Mismatch." From comparing the rows in Notepad, I can see that the rows that were not imported have a different column count, as delineated by commas, than the imported columns.

A couple of things are worth noting:

1) In the export file, the column count varies from row to row. (A full row contains 13 columns. Some columns have 8 or 13 or 12... which of course is the problem.)

2) The rows that import are not necessarily consecutive. For example, it may import rows 10-13, not import 14-19 but import 20-23...

When I look at the file as it was prior to putting in my html code, each row has 13 columns. The only difference seems to be the number of commas but there are no commas in the code that I inserted.

Any help would be greatly appreciated.

Ethan