The data has been stacked: the first 'n' rows correspond to the time course data for the first bioreactor vessel, the following 'n' correspond to the next bioreactor vessel etc. Var is on the y axis, age or timestamp on the x-axis, bireactor is the wrapping variable and/or data filter variable.
Looking at your data table, to get it into this shape you would need to first transpose the data and then stack the columns.
-Dave