You are only seeing this when you transition from the 2nd to 3rd breakpoint? (1st to 2nd appears to function normal)?
Can you post the code around the 3rd breakpoint, or perhaps post a screenshot of what's happening in the debugger?
Did you try using "Step over" function (F10) rather than using "Step into" function (F11)?
Creator supports upto 7 Hardware breakpoints, beyond which software breakpoints will be available.
Sometime I have the same pb. I use step over (F10) not step into (F11).
As Bobby mentioned, it actually depends on the type of code around which you are trying to Step Into. For eg, I have seen debugger going into Disassembly file for sprintf instruction.