I just wonder, is this game perfect or it has some defects?

for example, I bought a couple of costumes (7) and they all appeared in the download list (ps store)
but I wanted to download them directly from the game.. I went to the game store, and 5 costumes I had bought were available for downloading from there, and the other two were not in the list. i could only buy them for the full price.
but then I finally downloaded the costumes from the ps store, and they all appeared in the game store and the game itself..

so, is it ok the game has got some defects like these? I thought it was just perfect

Every game has some bugs or deflects, it's obvious. LittleBigPlanet is just a game created by ordinary people. I think it's obvious to you that you're not able to draw a perfect square, and perfect circles do not exist, etcetera. There may be a software without any bugs, but it would have to be something like a "Hello World!" program. Games like LBP are too complicated for what you're calling "just perfect". LBP has a lot of awesome features, and just because of the way programming works, every feature added adds a few new bugs, some of them are just corrected later. There's a simple rule followed by many great programmers, "First get it to work, THEN get it to work good/fast". LBP wasn't so great while it was being developed, they just kept making it better, but no one can make a game perfect. If you look at the source code for a game it would probably look extremely complex, there would be thousands of lines of code, most of it wouldn't make sense for you at first. But it's just a lot of simple steps to it, otherwise it wouldn't be as great as it is right now. If I would write the whole LBP I would probably say it's very simple. But there's one main flaw in simplicity, the imperfection.
The other thing I wanted to say is that you for sure often see levels about what we call "glitches" and that name has a reason, they're just bugs that people find while creating. Some of them are very useful, so I don't think it would be that much better if LBP would be a perfect game.

Ok, here we go.

Every game has defects, just, some are most notable than other for example; Ironically we have a bug every time they patch something on LBP, The level link break-up, etc... When would need a whole webpage just to have enough space to point out LBP's defects. It's amazing, but it's not perfect. But you should focus on the good things, of this wonderful game.

Good Day.

Well, LBP2 can certainly cause a PS3 to crash far too often. It permanently froze several times when I was using the Slice & Dice tool, and one time it even permanently froze on me WHILE I WAS PAUSING.