But why are the Deeds listet at 1st, 3rd, 7th, 11th, 15th and 19th Level?Or is it only the hint, that new Deeds are available?
Yes. Swashbucklers can access new deeds as they gain levels.
Take Kip up:
Kip-Up (Ex): At 3rd level, while the swashbuckler has at least 1 panache point, she can stand up from prone as a move action without provoking an attack of opportunity. She can stand up from prone as a swift action instead by spending 1 panache point.
As you can see, it starts with 'at 3rd level' and then goes on to tell you what you can do. You can't use it if you're do not have at least 3 levels in Swashbuckler =)