Copy Rows From One Sheet To Another Is Skipping Every Other Row

On the attached example there is a button called 'unsettled hedges', click this and it loads a userform. In this example, there are 10 rows of data that want a value entering into the 'returns' textboxes.

If you try to enter a value into all of the 'returns' textboxes and click the 'settle hedges' button then all the values from the textboxes should against the relevant row in column L of the 'unsettled hedges' worksheet and then each of these rows should be copied to the next available row in the 'settled hedges' worksheet.

This isn't happening though, instead, it is copying across every other row from the 'unsettled hedges' worksheet, leaving half of the rows still on the unsettled hedges worksheet.