[BUG] lifetime usage lower than last 30 days of usage

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

using /stats to see lifetime usage. Noticed that usage of last 30 days is 4.7m tokens and usage over lifetime is 4.5m tokens. I use CC in WSL and MacOS across 3 machines. Unsure if relevant.

<img width="1236" height="820" alt="Image" src="https://github.com/user-attachments/assets/8d65c6b0-01d1-49d2-a2e9-37da1f667e6d" />
<img width="1004" height="808" alt="Image" src="https://github.com/user-attachments/assets/56101b81-83c5-46d9-a313-f039eedfd498" />

What Should Happen?

/stats should report accurate usage by model across all devices using a given account.

Error Messages/Logs

Steps to Reproduce

1. entered claude code in a repo
2. ran /stats
3. pressed R to cycle through dates

Considerations:

1. using CC on 3 machines, but never at the same time
2. Not using other tools (ex. conductor)

Claude Model

Opus

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.90 (Claude Code)

Platform

Anthropic API

Operating System

Other Linux

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_