Chart updates inconsistently when dynamic array resizes

You made a very good point in converting the Years as real Date values - EDIT: TEXT( Years, "0000" ) also does it. Unfortunately this doesn't address the whole issue

    NB: In any case <false blanks> must be replaced (not a problem)

#1 Changing TOPN when the series are in columns doesn't work. Before:

After TOPN change:

#2 With a Transposed array (series in rows) TOPN can be changed to any value, this works no problem

#3 With a Transposed array, not changing TOPN but START Year. Before:

After START Year change:

Thanks much again Riny_van_Eekelen​