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.

[![](https://i.stack.imgur.com/IhoQV.png)](https://i.stack.imgur.com/IhoQV.png)
Here is my attempt:

```
+----------+---------+----------------+----------------+----------+---------+-------------+-----------------+------------+
|    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?