2 weeks to go. Found a couple of seeds on lower buds?

I have 2 weeks to go. I wanted a smoke so trimmed a couple of lower buds off the bottom of the plant but found the odd seed. The seeds were biggish but still green.Any idea what would cause this or is this a normal process. All the tops look fine and i cant find any bananas at all.

 

I cant find any bananas thats what made me wonder why there is the odd seed down low