Excel export of queried data limited to 500 lines

when exporting queried data (for example, in journal enquiry screen) - the export function used in the documents tab - actions - excel export, is exporting max 500 lines, although 1800+ were found. However, when using the excel export on the same screen; Global export - export under excel - all 1800+ are exported completely. Anyone have ideas why this is happening? Thank you.