Can or can not D-Wave's quantum computers use Shor's and Grover's Algorithm to find encryption keys? Why? I read that a company called D-Wave Systems has and is manufacturing quantum computers of 128 qubits.

Can they or can they not use Shor's and Grover's algorithms for finding RSA-keys? If they can't then why not?

And how come it was so hard for the team at MIT to create and maintain a stable 5-qubit quantum computer ion trap if D-Wave has already succeeded in creating Q-computers with more qubits?

It feels like something with this D-Wave computer is off..? Would be extremly grateful if anyone could enlighten me.
D-Wave's "Quantum computers" are NOT general purpose quantum computers. They can only do quantum annealing, which allows a small subset of problems to be solved. They can't run Shor's or Grover's algorithms, as these aren't quantum annealing problems. It's also still an open question whether D-Wave's machines even provide any speedup over classical simulated annealing systems.