Problems with MHRA style

I am new to Endnote and using MRHA. my problem is the citations in my document are not shown in the order in which they appear. what should be citation 1 as it appears in the first line of my doc, The Rule of St. Benedict actually appears as citation number 18, advice would be much appreciated, see below copy and paste from my document:

This paper argues the relevance of applying The Rule of St. Benedict (RSB),18 [Ma1] a 1500 year old monastic treatise to the accepted strategic business management system; the Balanced Scorecard (BSC).56