The two reports are using different criteria to determine loan delinquency:
Loan Delinquency Analysis
With the 13.0 release in the spring of 2013, the Loan Delinquency Analysis Report (Tool #461) was changed to report loan delinquency in days instead of months per updated NCUA requirements (see below*).  The current processing date is compared to the next payment date to determine the actual number of days delinquent.  This is most commonly used report for obtaining delinquency information for the 5300 Call Report. 
*Effective June 2013, we are revising the delinquent loan schedules on pages 7 and 8 of the Call Report. Specifically, we clarified reporting requirements by changing delinquency categories from “months” to “days.” 
Old Categories June 2013
Delinquency Categories
1 to < 2 months 30 - 59 days
2 to < 6 months 60 - 179 days
6 to < 12 months 180 - 359 days
12 months and over >= 360 days
This change aligns our reporting with other federal regulators. More importantly, it eliminates confusion arising from differences in the number of days per month.

Collection Delinquency Report
The Collection Delinquency Report (Tool #637) uses the delinquency aging levels defined by the credit union Via Tool #225 "Collection Parameter Configuration."  These categories are configured in months and days and are used for monitoring collections activity. 
Remember that these periods have always been independent from those used on the other report and do not necessarily even have to match the timeframes.  For example, many CUs have one or two aging other levels (such as 10 days delinquent) that they use simply for day-to-day collections efforts, separate from whether the loan is reportable to the government.