I'm trying to identify the harmony used in the main theme of Beethoven's Appassionata's second movement, and I would like someone to review the analysis I have done, and help me identify a couple of chords.
+----------+---------+----------------+----------------+----------+---------+-------------+-----------------+------------+
| Bar | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
+----------+----+----+----+-----------+----------+-----+------+---+----+----+----+--------+-----------+-----+-------+----+
| Beat | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 |
+----------+----+----+----+-----------+----------+-----+------+---+----+----+----+--------+-----------+-----+-------+----+
| Chord | Db | Gb | Db | Gb(add6) | Ab(sus4) | Ab7 | Db/F | | Db | Gb | Db | Bbb7? | Ab7(sus4) | Ab7 | Db/Ab | Db |
+----------+----+----+----+-----------+----------+-----+------+---+----+----+----+--------+-----------+-----+-------+----+
| Function | I | IV | I | IV(add6)? | V(sus4) | V7 | I6 | | I | IV | I | ? | V7(sus4) | V7 | I64 | I |
+----------+----+----+----+-----------+----------+-----+------+---+----+----+----+--------+-----------+-----+-------+----+
Specifically, I'm not sure about the second chord in bar 2 and the second chord in bar six. Which would be this chords and their functions?