import map issue.thanks

[Joy]

we use import map to map some fields, in this way, we can import some data
from csv file to ms project file.
we use a task id to merge.
now we add a task on the server side. the task has a task id, say 30.

then data is written into csv file.

after that, we use map to import data to ms project

since the task is added on the server side, in the MS project file, no task
id is 30. task id used for merge. now problem comes. sometimes there is
blanks row, sometimes, fields are wrong.

my question is what we could do about this??

thanks