Pokémon Platinum (U) problem

I'm having a few problems with this rom...
1. If i deposit a pokemon into SOMEONE'S PC, then come back later, the deposited pokemon disappear
2. I have to save twice, because for some reason it always loads the second-last save
3. It freezes whenever i finish a battle with this one trainer by Mt CoronetCould someone tell me what's going on? I'm doing quite well, but these problems are getting annoying.

Replying to #1

Card? Firmware?The save twice problem isn't actually a problem with the ROM (mostly). It's the issue (mostly) of the firmware.

R4 with kernel v.1.18

Replying to #3

Update to the latest (Don't know if this is, too much customs xD)Do you have cheats on?

Sadly, this IS the latest. The R4 team shut down for some reason a year or two ago, so no new kernel :(
And no, i don't even have cheats for it. Also, i never used PokeSav on it (i heard that causes problems)

Replying to #5

Hmmm... No, I don't know anymore. I shall begin a patch...

ARM 7 patch?
Or try YSMenu.

What's YSMenu?

Replying to #8

Modify TTDS Firmware for R4 (I think,I'm not quite sure)
https://www.romulation.org/forum/index.php?topic=27617.0

Thanks i'll check it out