Seems to have been reduced at some point.
This season there are
Regional Pro Elite #1
Regional Pro Elite #2
Regional Pro Competitive #3
Regional Pro League #4
Based on my teams' forum notes and trophy case, since Season 50 at least one Elite (#3) and six Competitive Leagues (#1, #2, #4 #5, #6, #7) have been lost. No idea how many basic Reg Pro have been condensed into this last one. And of course there may have been Elites beyond #3 and Competitives beyond #7.
As to what happened from last season, I dunno. Most recent now missing league in my team's records is from Season 62 (Competitive #4).
In Season 62, 58, 52, 50 the OffTopica Miracles were in Regional Pro Competitive #4.
In Season 55 the OffTopica Miracles were in Regional Pro Competitive #5.
In Season 57 the OffTopica Miracles were in Regional Pro Competitive #2.
In Season 51 the OffTopica Miracles were in Regional Pro Elite #3.
In Season 59 the OffTopica Grace and Word were in Regional Pro Competitive #2.
In Season 54 the OffTopica Word were in Regional Pro Competitive #5.
In Season 52 the OffTopica Word were in Regional Pro Elite #2.
In Season 50 the OffTopica Word were in Regional Pro Competitive #7.