Logical check working some of the time

Hello everyone! Please see attached image. I created this formula last night to basically create a bill of materials for my order list (circled in blue). It's saying if the column H values are equal to the column D values and if the column E values are equal to 0.75 (it's coincidence that they are all the same), then sum the quantity of that size.

So here, I have 1 that is 5.5x.75, 2 that are 5.75x.75, and 1 that is 6.25x.75. My question is why isn't my formula working for the ladder size? It works for the first 2 but not the 6.25. I'd appreciate any kind of help!!

Thank you
Scott

Logic question.JPG