Patrick had to do a manual reset of the site today to fix the problem with shops not stocking and stocks not changing, and this caused the unexpected side effect of the springs count resetting for many users, including myself.
At this time, Patrick thinks he may be able to put levels back where they should be, but he can't guarantee it yet. Let's just cross our fingers and hope!
***Edit: Just checked, the problem was fixed for those who were affected by the manual reset. =)