This is not an entry-level position. These are elements that the institution would like in order to fill an existing gap, but could work around for the right candidate. This presents an opportunity for you to demonstrate skills and knowledge that are related, but not exactly as suggested. For a webmaster position, you should provide any experience you have, such as creating and maintaining a web site for a commercial venture, school project, or hobby organization. Instructional experience may have been attained in a volunteer environment such as Red Cross CPR Trainer, Sunday School teacher, or math tutor.
Search committees look for anything that gives one candidate an edge over another.
Search committees have set a date to meet and discuss applicants. If your application materials are not received by that date, you are at a disadvantage. The terminology in the position announcement varies, each with its own specific meaning. In this case, the committee will begin discussion as soon as possible after the date, but applications received after that date may still be considered. All application materials must be received by that date and time.