Need help with my brake upgrade!!

Well, when I first got the brakes I test fit them to see if I would need spacers. And they rubbed alittle on the inside of my wheel spokes so I went out and got some 8mm spacers. Well, I just test fit them to make sure they would work well, and there was a huge gap! So I took the spacers out and tried it again…and it fits properly! I don’t get it! I didn’t change a thing! It’s a good thing because it means I don’t have to change my wheel studs, but I really don’t get it!
So…I just need the T adapter and some lines and I will be done!

Anyone want these spacers?? 8MM, universal type, fit’s many different 4 or 5 bolt patterns. $16 Thast’s what I payed for them 2 days ago!