Unless the seconded position was totally irrelevant to your career path and adds no value to your resume, I would add it to your resume and Linkedin profile.
Taking on a time-limited, seconded position can help show that you are flexible and willing to take on challenges.
Experience is experience. The trick is to leverage the skills that you gained at the seconded position, to your regular position and hopefully, setting you up for a future position.
I would suggest taking the ‘buzz’ words from the seconded position’s job duties and strategically add them to your resume, under the Experience Section.
Write them in past tense but action oriented verbs e.g. created, developed, initiated, promoted etc.
I scheduled a phone interview for 2:30 p.m. mountain standard Time and when I went back to my email to reconfirm whereas it was 10 minutes later than 2:30 already it reads please allow for a call within 30 minutes of the scheduled time. That seems strange to me.. and now we approach the last 5 minutes of that 30-minute window and still no hide no hair no phone call. Do I reach out to them after the 30 minutes is up or do I assume that I should move on and keep looking elsewhere?