Thank you for clearing up a lot of questions. Couple of things you are going to have to do. First you are going to have to contact Toro to clear up your warranty information. Because Home Depot gave you the wrong registration card, I’m assuming you sent it in, Toro has you purchasing a model 75742 and you have a model 75755. Because they have no record of you purchasing a 75755, you will not have any warranty nor will you receive any info from Toro, if a problem should occur with your unit. Second, did Home Depot inform you that you can get an extra year of warranty if you purchased a maintenance kit at the time you purchased the unit? Need both on the same receipt. Now let’s get to your problem. First, looking at your pictures I can see that your landscape contains a lot of sandy soil, and this is the main reason for your problem. This model has a deck designed to lift the grass very strongly for a better cut. Because of this extra lift it is sucking up a lot of sand and other debris. This will do two things. One because of all that sand being sucked up, your blades are going to wear much faster than your old unit. Not much you can do about it, because that is a problem for anyone with sandy soil. This also causes more dust in the air around the unit. Second, if the deck is not leveled properly, discharging all that much debris is going to come out everywhere. Should be able to reduce much of it by setting the deck up properly. I have attached a download of the service manual for your unit, so with it and your owners manual you should be able to set the deck up properly. Hope I’ve answered your questions. If you need more help please feel free to ask more questions. Plus please let us know how everything works out. Good Luck.