If you consistently sync at or around the speed that you mentioned in the first message, your IP profile should automatically go up to 1000 kbps after three days. It's not normally manually set unless it gets stuck, which may have been what happened to you. I suggest that you wait for a few days and see if the automatic process works. But do be aware that, if you get another low-speed connection your IP profile will go straight back down (*) and you'll have to wait another three days for it to come back up.
(*) There is a process called 'blip logic' which is supposed to avert an immediate drop in the IP profile caused by an occasional low speed re-sync, but it only comes into play after 14 days at the higher speed.
Eric