Android, Smartphone help?

Okay, so i bought my phone Huawei ascend y300 this week on monday and got it on Wednesday. I've been up a few nights trying to figure out everything about this phone, It's a really good phone but mine came with a small pink spot inside the screen at the bottom, it's not a damaged pixel so I'm fine with that but my main problem is with the Android operating system it uses.

So whenever i change it's default storage location to my SD card (2gig) I notice that my old pictures taken from the phone's camara disappear from the gallery, so when i do switch back to internal storage, there's still nothing there but after a few minutes it all comes back but my old pictures taken form the phone's camara stay blank and their memory is 0mb so basically there's nothing there, it's blank and those pictures aren't that old since i only just got the phone on Wednesday and reset it a day ago since i encountered got the same problem. (my recent taken pictures and screenshots are okay but am afraid i will lose them too)

I already have an app called Lookout which detects for viruses from apps i have and which i install and i already have run a scan to see if there are any viruses but there aren't any.

Another problem is with the game saves, where do they store the save data? because I have a game called CSR Racing and my phone's internal memory is really low so i clear the cache every now and then since it stores about 50 to 100mb a day and when i do so, it clears the cache from all apps, but this game called CRS Racing is using it's cache as a save location so whenever i start that game i have to start again from level 1 unless if the servers of the game have backed up my last account's progress

Please help me if you know what the problem is or if you have encountered the same thing with your android devices because this is my first smartphone and my first time in using Android, i had an ipod touch before and i find that much better and secure to use despite the headache of trying to get itunes to run on my Linux

I have 512mb ram and only 393 is usable but the phone's services use it up leaving me with only 70mb free

I do have a years guarantee on this phone so if there's a problem with the ram then i can return it back but if it's just the Android operating system then i can't do much but to backup my data and or transfer my pictures to pc or another folder

Thank you for your time in helping