Modification order

Recently my ex and I had a modification meeting with the OAG. They informed us that child support should be increased by almost $700, which my ex was not ok with. We aren't on terrible terms as far as coparenting so we were able to agree to a smaller amount (increased less than $100 from what it was). While we were talking the OAG rep said several times that it would be harder to modify later on since we were agreeing to something different than the standard calculations. I've been wondering since if those comments were directed more towards me that it would be harder to raise it if circumstances changed, to him since one of his concerns is that he hasn't been at this job long, or just in general that it would be difficult for either of us?

Just to add, I'm not planning on taking him back to modify. I'm just curious since it was said several times.