Single Cylinder Batch vs Sequential not doubling number of pulses but doubles/halves the fuel

**Describe the bug**
on single cylinder configuration, injection is always in sequential pattern, switching to batch mode halves the fuel, but does not double the number of injection events

**Hardware**
- Board: any

**To Reproduce**
Steps to reproduce the behavior:
1. Set up one cylinder engine in sequential injection mode
2. Stare at logic analyzer
3. Switch to batch injection mode
4. See that number of pulses did not double, but fuel pulse length was cut in half

**Expected behavior**
Number of pulses doubles on a 1 cylinder engine, like it does on a 2 cylinder

**Screenshots**
https://youtu.be/WJPuQXsXoik - 1 cylinder

two cylinder version of the same works fine:

https://youtu.be/VdpHw4U1WQc

**Additional context**
European mopeds are suffering.