Does anyone else have problems with their bird feeders. We have two that are similar, one for wild bird seed and the other for sunflower hearts. Both have the same type of feeding holes, which when the birds eat the seeds, extra seed is supposed to drop down to replenish it automatically. However our seed does drop down, meaning that we have to poke or bump the feeder for more food to fill the holes. This means a lot of the seed just falls out and is wasted. Difficult to describe, but if anyone has a similarly styled feeder they may be encountering the same problems?