Strange problem

My brother has showed me how to get free downloads from youtube, and i love it! He also gave me a micro SD card for my phone so i could have music that i download on my phone.

So at this point i have 20 songs. I put them all on the SD card. I double checked to make sure that all 20 were there, by counting and matching up song name between the file on my computer and the SD card. However, when i put the SD card in my phone, it only shows up 16 songs. Thinking somethings wrong, i put the card back in my computer and i still have the 20 songs. All the songs are in the same format, and i didn't have any problems with the download of the 4 songs that i'm "missing." I know for a fact i didn't run out of memory on the card either, it's 1.9 gigs.

What could be the problem?

I don't even know...

Easy Youtube Video Downloader? I use it. Its pretty cool. Only issue is making sure you are downloading the highest quality vid that you can find...

Only thing I can think of is wiping the SD and put it in the phone and then transferring the songs to the phone.

Have i truly stumped the neckbeard forum? Talked to Her_Sir about this earlier too, he has no idea either. I was advised to reformat the card, so i'll give that a try. But first i'm going to download another song. I want to know if the songs are somehow the problem, and not the card. If it's not either one, then it's the phone. If that's the case, then i really don't have a whole lot of options.

Okay, an update on the problem. I downloaded two more songs onto the card and the computer and made sure that they were on both. When i put the card in the phone, it shows that i have 18 songs instead of 16.

It has to be something with the four songs. but like i said, they're all the same format... maybe it's a glitch?