So there is no intro limit for items? just categories?

The intro text limit applies to the items of a category listing and not the item page itself.
The setting is located under the "Item view options in category listings" options of the category.

OK, sorry but I just found it all confusing because you have intro text setting in the item view too but I guess that is for when you have two editors.

Two more questions:

1, If I have the two editors so I can dictate for each item how long the intro text is for each, what are the best settings in the category view intro text?

2, I want to buy the Pro version of K2store, I know it has the Paypal plugin with it but can I set Credit card payment with that option too?

Thanks,
Simon.

There is no intro limit option for the item's view introtext. There is only the option to Show or Hide it.

1. Despite of how many editors you are using in the backend you can limit the amount of words your introtext will show in the category listing.

2. K2Store is not an extension developed by us. You need to advise the extension's support team for this.