1998 Christmas Stamps

My Harris Liberty album shows three (3) different sets of Christmas wreath stamps issued in 1998. They all look similar to Scott 3245-48. One set is shown on a page where sheet-type stamps are shown. The other two sets are shown later in the album on a page titled "Booklet Singles" making a total of 12 stamps. I only see a total of 8 stamps shown in the various catalogs that I have. Can someone clarify which Scott numbers are assigned to each of the 3 sets and the differences between the sets.

Technically, there were only two sets of wreaths. Scott 3245-48 were physically smaller and were issued in VMBs (Vending Machine Booklets). Scott 3249-52 were taller than the VMB stamps but were issued in two formats ... panes of 20 & booklets of 20. So if your album has spots for 3 sets, I would guess that 2 sets will have the taller stamps ... one for sheet stamps & one for booklet stamps. To confuse the situation a bit more, there are two different die-cut gauges used to produce 3249-52 booklets ... 11.4x11.5 & 11.7x11.6. Minor numbers were given to the 2nd set, 3249a thru 3252a. So you could also look for the two different gauge sizes to fill your album spots. Blocks of 4 of the two gauges are 3252b & 3252d. Full booklet panes of the two are 3252c & 3252e.
Added: Note that most of the booklet stamps will have 1 or 2 straight edges. But, due to the booklet format having 3 rows, not all booklet stamps will have straight edges.

Many thanks for the explanation.