Importing Tradestation data file ==> Volume (Up + Down) is off by 2

"Date","Time","Open","High","Low","Close","Up","Down" 02/18/2020,16:06,3370.50,3370.50,3370.00,3370.25,315,759 02/18/2020,16:07,3370.25,3370.25,3369.00,3370.00,1357,1535 02/18/2020,16:08,3370.00,3370.25,3369.75,3370.25,396,304 02/18/2020,16:09,3370.00,3370.25,3369.50,3369.50,235,1391 02/18/2020,16:10,3369.50,3370.00,3369.00,3369.75,848,789 02/18/2020,16:11,3369.75,3370.25,3369.75,3370.00,513,618 02/18/2020,16:12,3370.00,3370.75,3370.00,3370.50,1133,246 02/18/2020,16:13,3370.50,3371.00,3370.50,3370.75,425,259 02/18/2020,16:14,3371.00,3371.00,3370.50,3370.50,215,309 02/18/2020,16:15,3370.75,3370.75,3368.50,3370.00,3981,4728

Date,Time,Open,High,Low,Close,Volume 20200218,16:06:00,3370.50,3370.50,3370.00,3370.25,1076 20200218,16:07:00,3370.25,3370.25,3369.00,3370.00,2892 20200218,16:08:00,3370.00,3370.25,3369.75,3370.25,700 20200218,16:09:00,3370.00,3370.25,3369.50,3369.50,1628 20200218,16:10:00,3369.50,3370.00,3369.00,3369.75,1636 20200218,16:11:00,3369.75,3370.25,3369.75,3370.00,1132 20200218,16:12:00,3370.00,3370.75,3370.00,3370.50,1380 20200218,16:13:00,3370.50,3371.00,3370.50,3370.75,684 20200218,16:14:00,3371.00,3371.00,3370.50,3370.50,524 20200218,16:15:00,3370.75,3370.75,3368.50,3370.00,8708