I just noticed that when I click on my SC51 there is no 2nd level if I double click in High mode. 2nd level works in both Low & Med. If I double click 9 times to put it into strobe then I have the initial level and strobe when I double click. If I then double click 8 times to go back to H1 & H2 there is only one level and double clicking does nothing. To make matters worse the level I get in High mode appears to be no brighter than strobe. I have tried fresh primaries and freshly charged enloops and have also left the battery out for 30min hoping to reset the issue but nothing has worked. Any ideas? Thanks!