Why does it mean when my 2010 Range Rover displays Only Normal Height Available

What is your question?

When I start my 2010 Range Rover Sport HSE a message on the driver panel behind the steering wheel says "Only Normal Height Available." When my guy drives it (or even sometimes if I'm driving) he starts pushing buttons and my car starts to move. He says it's a suspension/compresser problem. He purchased a suspension conversation kit. Do I need a mechanic to perform the conversion? Or should he stop pushing the buttons? When I drive alone, that message comes on then goes off. The little yellow triangle stays on but my Rover never rocks and roll. What settings should I leave on all the time when I'm running errands, on normal terrain, under normal conditions?

What makes this problem better or worse?

When my boyfriend doesn't change settings my car doesn't move..

How long has your 2010 Land Rover Range Rover Sport had this problem?

My guy says it's been happening for quite a while.