Don’t worry, this is common early on.
Warmup scores can appear skewed when accounts are just getting started. For example, a single bounce can make an otherwise healthy account look worse than it is.
Let the accounts stay in the warmup pool for a few more days and use different date filters (3, 7, 10-day views) to spot trends.
If scores stay low, let those accounts continue warming up a bit longer before using them for outbound.
