If you apply for jobs online, this is a must-read. (Though I know this probably — hopefully? — doesn’t apply to my readers.)
Following instructions counts. Yes, it certainly does, and it isn’t that difficult, really. Not only does it waste the potential employer’s time reading careless replies, but it also wastes YOUR time, since you’re the one taking the time to send the application/inquiry.
Whether you believe it or not, it does make a difference in whether you get the job or not. Careless efforts and not adhering to the instructions won’t get you the job.
Point: If you can’t follow (usually) simple instructions for applications, then the employer is going to assume that you cannot follow instructions to get the job done!
How to remedy this? Read the instructions thoroughly before replying.
As the editor of a growing writing website, I can attest to some of the issues listed in that article. I don’t ask a lot of contributing writers, but the least you can do is use proper grammar, not chat-speak, when corresponding with an editor.