The RSW2 has a few hidden functions. The switch is made of two parts within the pressure board (see attached image); Part A at the top and Part B towards the bottom.
- A goes directly into Strobe when pressed.
- B can be set to a desired brightness level (low>med>high) as a steady beam. It can also be set to "Strobe"
To configure Part B into desired brightness level:
- Press and hold down B
- With B held down, quick tap A. Each press of A will cycle through low>med>high
- With B held down, press and hold down A for 2+ seconds. When the light starts to strobe, both A and B are configured to "Strobe"
- The functions above will be memorized the next time you press Part B
From what you described, it is likely both A and B have been set to "double strobe". You can follow the steps above to reconfigure Part B to whatever mode you like.