The tops were brand new, never used before, but it turns out they were the problem! I tried one of the metal cap sealed bottles and lo and behold it was perfect. At least now I don't have to decide which caps to use in the future...
@JBmadtown: After fermentation I started a siphon to transfer the brew from the secondary into a food grade plastic bucket with a spigot on it for easier bottling. As the liquid was transferring into the bucket, I slowly poured in a sugar solution with the 5 oz. priming sugar dissolved in 1 cup...
For my first homebrew I decided to stick with a Hefeweizen LME kit that I bought online for simplicity. I followed the instructions to a T, making sure to sanitize everything, and yes I made sure to add the yeast and priming sugar.
It rested in a primary fermenter for 4 days, a secondary...