May be you noticed that there some differences between structure of the the same modules in Dolphin and UNA. For example: Videos and Photos modules don't have ability to create Albums, thus photos are transferring to the Albums module by default, but not to the Photos module. Videos from Dolphin are transferring to the UNA without Albums

Yes, it is clear that I noticed this, but:

• The migration script does not transfer all photos or videos.
• The migration script does not transfer the views, the views are a field that exists both in UNA and in Dolphin. It's just a number in a field in the database that should be transferred. Profile views are transferred, why aren't photo and other media views also transferred?

 Also there are the big differences between timeline in Dolphin and in UNA. It means that not the all content from Dolphin can be transferred to the UNA. Also if you have any modifications in default profiles or other modules structure's in Dolphin there are also may be problems with migration to UNA. 

• The same problem and here the views are not transferred
• Also, the posting date exists in dolphin and in UNA, it is not transferred, the post on the timeline appears to be from the transfer date. A timeline without a posting date is no longer a timeline.
• Also, not all posts of the same type are transferred, only some. for one reason or another the transfer stops without any error message.
• The number of transferred objects does not coincide with reality, the script does not know exactly what it is transferring, it reports a number, which does not coincide with reality.

I can help you with Profiles migration if you like and will check where are you have a problems with avatars.  

• If you know how to solve this problem with the avatar, you don't have to help me, you'd better give directions in the transfer instructions, that way you'll help everyone. https://una.io/wiki/Dolphin-Migration-Tool