After converting to phpbb 3.0.11 and upgrading to 3.3.11, two "problems".

[wonder_wonder]

First of all, I don't know if this message is better here or in the converter subforum, but it is not the converter's problem...if it is necessary to change the section, please move it.
Detail:

VB 4.2.5 converted to phpbb 3.0.11, there, in that version, I cleaned up threads and users.

After that, I upgraded to 3.3.11.

Ok, in both 3.0.11 and 3.3.11 I see the following happening to me:

1.-After deleting many threads, for example, my user indicates that he has rest neither.
If I click on my messages, on the link, to show me the latest ones, it shows me a series of threads that I have deleted, obviously, if I click on one of them it tells me that the thread does not exist.

2.- Avatars: People who do not have an avatar do not show a predefined blank avatar (in a clean installation from 0 of 3.3.11 it shows users without an avatar with a blank one, but it shows that one) however, in the mine, after the upgrade from 3.0.11 to 3.3.11 it shows how this forum, the users do not have an avatar, it does not show anything, I would like, if possible, for it to show the default one in white (I don't know if I expressed myself correctly) .

I have not yet published the forum until I correct these small problems, I have a backup of the database and files of both version 3.0.11 and 3.3.11

Thank you and greetings.