DIY Disaster!!!

I have been cloth diapering now for over two years. From the start, I used Rockin' Green detergent with great results. Within the last six to eight months, I began making my own laundry detergent for our regular laundry in an attempt to save money. My home made detergent recipe worked beautifully. Recently, I came across a recipe for homemade cloth diaper detergent on Pinterest. I had heard great things about it from people who had regular-type water, so I mixed up a batch since I already had everything on hand from making my own detergent and was running very low in RnG anyway. For about a two weeks, my homemade diaper detergent worked great. I used the same measurements as I had always used with RnG and the same type of wash routine. After a couple weeks, though, I began to notice that the diapers began to still smell after they were "clean". So I tried adding more detergent, and that seemed to do the trick. Then a few washes later, I began to have issues with repelling. So I added another long rinse at the end of my wash. It was beginning to frustrate me. For two years, I hadn't had any issues what so ever with my diapers (while on RnG). So I happened to find a sample of Rockin' Green in my laundry cabinet while organizing last night and used it in yesterday's diaper laundry. And of course, it worked like a charm! So I guess I will be making a trip to my local cloth store or placing an order for some Rockin' Green (in Motley Clean, of course!). I suppose the moral of the story is: if it ain't broke, don't fix it! And from now on, I'll leave the delicate chemistry to the professionals!
Have you ever tried any DIY and had it turn out horribly wrong? I'd love to hear about it!