I can only have 1 dev product?

Now I think I am quite a decent scripter, though I have only been learning for 6-7 months so far, I'm gradually getting more experienced the day. So, I am creating a minigame, I then add a devproduct, and boom finished. I play it, buy the test purchase, and it gives me the points I want from the purchase. But then when I make a duplicate of that script, but change the ID's, and the amount of Points the buyer gets, it just works for that one??

Look at this :

https://gyazo.com/6888ccc6a55b26e90bba775f208aa5d4

I can't seem to find any issue in the script, now you may say, you need another script to do lines of code. Well yes, I know that, and I have actually done that, here is proof :

https://gyazo.com/1f5f590d875caa8249dc0c3c5ddd2dd8

^^ line of code 1 ( for the 1st dev product )

https://gyazo.com/30fe8ed2c053ea53a1bcc51bd234832d

^^ line of code 2 ( for the 2nd dev product )

Well, yeah. Just please help me out on this one...

I don't know if this site is active, since I just joined, and have experienced literally nothing, but I'll try to help people ;)

Thank you in advance, CrimsonFlux