for what you are trying to accomplish, you wont be updating the existing record, you will be inserting a new record each time
you should have a main table, say for jobs:
jobID - Primary Key
jobName
etc....
then a jobProgress table:
jobProgressID - Primary Key
jobProgressJobID - relates to jobs.jobID
etc....
for each progress, insert a new record and use the jobId value in the jobProgressJobID column