Is the ringed 3 at r6c2 a real clue?

No. It is touch feedback over the fixed clue r6c2=9, whose persistent rectangle is r5c1:r7c3 with area 9.

Where does the r9c5=8 clue finish?

It occupies r6c4:r9c5, a 4x2 rectangle with area 8.

Twelve persistent rectangles cover all 72 cells.

MeowBlock! level guide

medium Target: 12 moves 11 colors

Solve MeowBlock! Level 49 by anchoring the lower-left 6/8 pair, keeping the central columns separate, and closing the upper 3/6/3 regions last.

Anchor r9c3=6 and commit r8c1:r9c3 as a 2x3 rectangle with area 6.
Anchor r9c5=8 and commit r6c4:r9c5 as a 4x2 rectangle with area 8.
Anchor r6c7=8 and commit r6c7:r9c8 as a 4x2 rectangle with area 8.
Anchor r7c6=4 and commit r6c6:r9c6 as a 4x1 rectangle with area 4.
Anchor r4c6=8 and commit r4c5:r5c8 as a 2x4 rectangle with area 8.
Anchor r3c4=5 and commit r1c4:r5c4 as a 5x1 rectangle with area 5.
Anchor r3c6=4 and commit r3c5:r3c8 as a 1x4 rectangle with area 4.
Anchor r2c6=8 and commit r1c5:r2c8 as a 2x4 rectangle with area 8.
Anchor r1c2=3 and commit r1c1:r1c3 as a 1x3 rectangle with area 3.
Anchor r2c2=6 and commit r2c1:r3c3 as a 2x3 rectangle with area 6.
Anchor r4c2=3 and commit r4c1:r4c3 as a 1x3 rectangle with area 3.
Anchor the obscured fixed clue r6c2=9 and commit r5c1:r7c3 as a 3x3 rectangle with area 9; the ringed 3 at that cell is not a clue.

Colors in this level:

Cyan, Lime, Light blue, Pink, Purple, Indigo, Green, Orange, Red, Lavender, Yellow

Do not commit an area-3 rectangle for the ringed r6c2 display; the final persistent lower-left region is r5c1:r7c3 area 9.
Do not merge the central lower regions: r6c4:r9c5 belongs to r9c5=8, while r6c6:r9c6 belongs to r7c6=4.
Do not let the r1c4:r5c4 area-5 column absorb cells from the r1c5:r2c8 area-8 rectangle or the r3c5:r3c8 area-4 bar.

Anchor r8c1:r9c3 area 6 and r6c4:r9c5 area 8 before resolving the lower-right pair.
Protect the central r6c6:r9c6 area-4 column and the r1c4:r5c4 area-5 column from neighboring previews.
Read the lower-left ring as interaction feedback and finish with r5c1:r7c3 area 9.

Board notes 5 details

Layout: Full 9-row by 8-column board with 72 cells. Clues: r1c2=3, r2c2=6, r2c6=8, r3c4=5, r3c6=4, r4c2=3, r4c6=8, r6c2=9, r6c7=8, r7c6=4, r9c3=6, and r9c5=8. The ringed 3 at r6c2 is a touch overlay; the fixed clue there is 9. No unknown clues appear.
Goal: Partition all 72 cells into twelve rectangles: r8c1:r9c3 area 6, r6c4:r9c5 area 8, r6c7:r9c8 area 8, r6c6:r9c6 area 4, r4c5:r5c8 area 8, r1c4:r5c4 area 5, r3c5:r3c8 area 4, r1c5:r2c8 area 8, r1c1:r1c3 area 3, r2c1:r3c3 area 6, r4c1:r4c3 area 3, and r5c1:r7c3 area 9.
Opening: The source commits the lower-left area-6 rectangle first, then the central and right area-8 blocks and the area-4 column. The middle 8 and vertical 5 follow, then the upper 4/8 regions; the top-left 3, left 6/3 pair, and lower-left 9 close the cover.
Danger Zone: Do not treat the ringed 3 at r6c2 as the clue value: it is transient touch feedback, while the persistent r5c1:r7c3 block has area 9. Keep r6c4:r9c5 area 8 separate from r6c6:r9c6 area 4, and keep the r1c4:r5c4 area-5 column separate from the upper area-8 and area-4 regions.
Mechanics: This medium board uses touch rings and transient area-correct drag previews. Only the twelve rectangles that persist in the late solved frames count; the final lower-left placement is confirmed by the last persistent redraw.

Is the ringed 3 at r6c2 a real clue?
No. It is touch feedback over the fixed clue r6c2=9, whose persistent rectangle is r5c1:r7c3 with area 9.
Where does the r9c5=8 clue finish?
It occupies r6c4:r9c5, a 4x2 rectangle with area 8.
How many rectangles solve Level 49?
Twelve persistent rectangles cover all 72 cells.