Marketo interface seems to be getting worse and worse. Constant errors, clicks that randomly doesn't work... increasing loading times... approval errors... frustration and more frustration. I honestly waste so much time working in Marketo due to the interface that I'm loosing patient.
Hi Diego - try using a different browser perhaps? Some browsers have different quirks when in Marketo. It likely will not solve all of your issues but hopefully some.
IE is not recommended. Firefox, Safari, and Chrome are all supported.
If you gave us a specific client setup, perhaps Support could help you. I've submitted bugs and they have had them fixed if they get the right info.
And yes, it can be buggy.