Hello and welcome to the forum Izwan!

Try saving another file, and see where it wants to save it. As DOIK says, it will show the location where it is saving at at the top of the box that pops up (It says "save in"). Hopefully you find the other pictures that have "disappeared" in the same folder. You can then change the location it saves to by clicking the arrow on the right of the "save in" location box and selecting the location you want use. You can also change the name of the file it saves as by overwriting the file name in the dialogue box "file name". Choose "save as a copy".Then click "save" and it will save the file under the new name. Then close the picture and say "No" when it asks if you want to save changes, which will keep the original file for later use.

4, 6 and 7 are very nice.

Are you sure you are not actually saving the altered file? Are you saving it as a copy? I always use "save as a copy" and then when closing the image say no to "save changes" ;that way you keep the original file in case you want to work on it again.Next time you use "save as" make sure it is saving it in the location you want and then look to.see if it has saved it there.
Sounds to me you may actually be saving the altered images somewhere.

Yes I agree too, nice shot. Being a bit picky I'm wondering if you could have got a bit more colour out of that sky?

Ditto from me.............

Any particular reason for putting your thread in the competition section

nice pic!

Graffiti, or rather, good graffiti, is far more artistic and relevant than a lot of the cr@p displayed at the Tate and similar "modern art" galleries. It can also do wonders in brightening up dismal and depressed areas of cities. Some of it has a relevant social or political message. I quite like Banksy's stuff, though I can't help but feel he has cashed in on his "street cred"; his anonymity seems a vain effort to keep it. Can't blame him, though.

What is "Art"? To me, my son is more creative than Picasso: he produces art of a similar standard, yet he is only 7 years old, whereas Picasso produced his scribblings as an adult.

Modern art is (IMHO) a load of tosh: the Turner Prize is a joke, but, if I could pass this off as art (a nominee for this years Turner Prize), I am sure I'd give it a go. As long as some "critic" can think of some complete bollox to talk about it, you're an artist.

My wife and myself visited the Scottish National Gallery of Modern Art in Edinburgh a while ago, and left after less than an hour totally bemused. An "installation" consisting of a fluorescent tube and a television showing white noise nearly got us thrown out: we were in stitches! Shame they didn't throw us out, really: would have stopped us wasting another half hour.

Nice blue, especially on the Pen..

Years ago I thought of painting my Zenit TTL with Hammerite, but unfortunately I have lost all my old film cameras....

I agree with Gareth's most eploquent appraisal