Heavy Duty Outdoor Sectional Sofa Cover, 85"X85" Waterproof 100% 600D Patio Sectional Couch Cover, V-Shaped Lawn Patio Furniture Cover

Is there much flex? our sectional is 84.5" so i'm worried it'll be hard to get the 85" cover to easily fit over. should i get the 100" size?

My v shaped set measures 90 x 90 x 32. Will the 100 x 100 x 33 cover fit my set ok without too much extra fabric flapping about?

It’s been a year I have this and most recently it no longer protects from water. It no longer works, why is that?

How do I apply the patch? Is it an iron on application?