We are aware of some inconsistency issues, but the ones you described are new to us. All enemies of a type should move according to the pattern of that type across all levels (some enemies start rotated though, which is bad since it makes it impossible to know what their first turn will be). The green, blue and yellow bacteria's pattern should always make them stop for one turn when something blocks their path.
There is the issue that it's impossible to predict which enemy will take priority, when two enemies try to move onto the same spot. Is it possible that you stumbled across this issue and mistook it for another?
Otherwise that'd be a pretty severe bug I'd like to know more about :D
Thank you for all the kind words and for taking the time to report this issue!