It is a loop with 1500 repetitions.Only 100 repetitions are done.
I do loop because I post 1500 posts on one site. Using other ways I would have to login to the site each time, which would slow the posting down by 3x.
Also I had cases where 1500 loops were done correctly but with just one thread.
edit:Load profile thing will probably work i will save profile names as username and the load if the file exists, but still I would like to get it fixed, because it is easier to work when loops work correctly.
Each iteration increases usage of system's sources. You can restart instances with Browser - Settings - Restart instance in the middle of the template to free system resources.