Adding 2 and 2 together I suspect the grind may be too fine for your filter [problem with the coffee not coming out]. I cannot explain why it seems to be OK for sis but I have had problems where the grind was too fine - the seal blows and water and grind goes to many places.
I cannot figure out the other problems - not having had them myself.
Were on our second Cafe Roma in 2 + months - the first had a crack in it - this one makes very weird clicking noises even when turned off (we were this close to returning it). Lucky for us they simply exchanged the first one ...
When you do get one that is less problematic - may be worth having a look at the following link: