Hello and sorry for a delay in answering you question. Thank you also for you kind words.
The description of your problem is not sufficient to give you an answer.
I am afraid that you tried a wrong way to accomplish what you need by modifying Utils Attachments module. It looks like you added two extra fields type File just placed on extra tabs, but they are part of the same record.
Utils Attachments already handles multiple files and you should not modify fields because results will be difficult to predict - as we see above. You should revert changes ASAP and use a different approach for sure.
The main reason for doing that is ability to upgrade Epesi in the future. Theoretically new fields will be carried over, but the module is not aware of these extra fields and we try to avoid a situation like this as much as possible.
Can you describe in plain English what problem you are trying to solve? If you intend to record a client activity maybe Timesheets module would be a better solution? In any case I would go in the direction of a custom module or another, ready to use, maybe modified, but better suited for this task.
Utils Attachments should be used only for that - writing notes and attaching files.
Client Activity module will need completely different fields, maybe modified Task module or Sales Opportunity? How about List Manager which was built to record a history of communication with a customer (contact or company) via phone, e-mail...
Please describe the business scenario and I will try to help you finding the best solution.